卤代乙酸类（HAAs）物质污染可来源于（）

A:汽车废气 B:饮水氯化消毒 C:装饰和建筑材料 D:垃圾焚烧 E:污染的化妆品

以下（）不属于云计算的3个层次。

A:基础设施即服务（laaS） B:平台即服务（PaaS） C:软件即服务（SaaS） D:硬件即服务（HaaS）

Prince Klemens Von Metternich, foreign minister of the Austrian Empire during the Napoleonic era and its aftermath, would have no trouble recognizing Google. To him, the world’s most popular web-search engine would closely resemble the Napoleonic France that in his youth humiliated Austria and Europe’s other powers. Its rivals—Yahoo!, the largest of the traditional web gateways, eBay, the biggest online auction and trading site, and Microsoft, a software empire that owns MSN, a struggling web portal—would look a lot like Russia, Prussia, and Austria. Metternich responded by forging an alliance among those three monarchies to create a "balance of power" against France. Google’s enemies, he might say, ought now to do the same thing.
Google announced two new conquests on August 7th. It struck a deal with Viacom, an "old" media firm, under which it will syndicate video clips from Viacom brands such as MTV and Nickelodeon to other websites, and integrate advertisements into them. This makes Google the clear leader in the fledgling but promising market for web-video advertising. It also announced a deal with News Corporation, another media giant, under which it will pro-vide all the search and text-advertising technology on News Corporation’s websites, including My Space, an enormously popular social-networking site.
These are hard blows for Yahoo! and MSN, which had also been negotiating with News Corporation. Both firms have been losing market share in web search to Google over the past year—Google now has half the market. They have also fallen further behind in their advertising technologies and networks, so that both make less money than Google does from the same number of searches. Safa Rashtchy, an analyst at Piper Jaffray, a securities firm, estimates that for every advertising dollar that Google makes on a search query, Yahoo! makes only 60-70cents. Last month Yahoo! said that a new advertising algorithm that it had designed to close the gap in profitability will be delayed, and its share price fell by 22% , its biggest-ever one-day drop.
MSN is further behind Google than Yahoo! in search, and its parent, Microsoft, faces an even more fundamental threat from the expansionist new power. Many of Google’s new ventures beyond web search enable users to do things free of charge through their web browsers that they now do using Microsoft software on their personal computers. Google offers a rudimentary but free online word processor and spreadsheet, for instance.
The smaller eBay, on the other hand, might in one sense claim Google as an ally. Google’s search results send a lot of traffic to eBay’s auction site, and eBay is one of the biggest advertisers on Google’s network. But the relationship is imbalanced. An influential re-cent study from Berkeley’s Haas School of Business estimated that about 12% of eBay’s revenues come indirectly from Google, whereas Google gets only 3% of its revenues from eBay. Worst of all for eBay, Google is starting to undercut its core business. Sellers are setting up their own websites and buying text advertisements from Google, and buyers are using its search rather than eBay to connect with sellers directly. As a result, "eBay would be wise to strike a deep partnership with Yahoo! or Microsoft in order to regain a balance of power in the industry," said the study’s authors, Julien Decot and Steve Lee, sounding like diplomats at the Congress of Vienna in 1814.
Yahoo ! and MSN are making less money for the same number of searches chiefly because

A:they are not good at negotiating with News Corporation. B:they are losing market share very quickly. C:they lack advanced advertising technology and networks. D:they have failed in designing their new advertising algorithm.

Text 4
IBM’s year-old, $ 2.5 billion computer-chip plant in East Fishkill, N. Y. , is a manufacturing marvel. Three-hundred robotic tools, six miles of networking cable and more computing power than NASA uses to launch the space shuttle all work together to produce tens of millions of chips a year-- each with circuitry 800 times thinner than a human hair. Not that you’ll find much human hair around the plant. Other chip plants need about 400 employees at all times to operate the Complex machinery. But today at East Fishkill, 100 engineers per shift oversee a totally automated production line. Last winter, when a fierce snowstorm sent everyone home early, the machines hummed along overnight without any problem. "The productivity increases for IBM are amazing," says Perry Hartswick, the senior program manager at the plant.
Productivity improvements like those at IBM can be a boon in a healthy economy, helping to make American business more competitive abroad and keeping a lid on inflation as employees work harder to meet strong demand for their products. But today’s soaring productivity is having a harmful side effect: it’s holding back job growth. Last Thursday the Commerce Department reported that GDP grew at an annual rate of 2. 4 percent. But unemployment was hovering at an uncomfortably high 6.2 percent in July, and 44. 000 additional jobs were axed from payrolls, marking the sixth month in a row the economy has lost jobs.
One fault is that seemingly profligate spending ’on high tech during the ’90s boom. More than three years after the bust, it’s continuing to generate a productivity payoff inside companies. Even industries like entertainment and higher education, once thought to be largely immune to productivity improvements, have been revolutionized by digital media, online research tools, cell phones and e-mail.
But that’s not the only reason for the problem. Over the last three years, American manufacturers have shipped 2. 6 million jobs to low-Wage countries like China. Meanwhile. a flood of white-collar jobs--like computer technicians and customer service reps--have gone to countries with well-educated work forces, such as India.
There is of course a simple solution to all this-a hotter economy, with stronger demand that would force companies to hire workers. But the seven-point decline in July of the Consumer Confidence Index doesn’t offer much near-term hope. Some economists also worry that Bush’s deep tax cuts are "a very expensive way of getting an amount of stimulus that is too small," says Janet Yellen, a professor at the Haas School of Business who also chaired Clinton’s Council of Economic Advisers. The Bush administration responds by asking Americans to wait until the full effect of the cuts are felt and the economy kicks into a high gear growth rate of 3 percent to 4 percent. For the millions of Americans who are out of work, that day can’t come soon enough.

A:American manufacturers should not ship jobs to other countries. B:the Chinese and the Indian took away many jobs from the American. C:New branches of manufacturers in other countries lead to the job problem. D:China and India are rising in manufacture industries.

Text 4 IBM’s year-old, $ 2.5 billion computer-chip plant in East Fishkill, N. Y. , is a manufacturing marvel. Three-hundred robotic tools, six miles of networking cable and more computing power than NASA uses to launch the space shuttle all work together to produce tens of millions of chips a year-- each with circuitry 800 times thinner than a human hair. Not that you’ll find much human hair around the plant. Other chip plants need about 400 employees at all times to operate the Complex machinery. But today at East Fishkill, 100 engineers per shift oversee a totally automated production line. Last winter, when a fierce snowstorm sent everyone home early, the machines hummed along overnight without any problem. "The productivity increases for IBM are amazing," says Perry Hartswick, the senior program manager at the plant. Productivity improvements like those at IBM can be a boon in a healthy economy, helping to make American business more competitive abroad and keeping a lid on inflation as employees work harder to meet strong demand for their products. But today’s soaring productivity is having a harmful side effect: it’s holding back job growth. Last Thursday the Commerce Department reported that GDP grew at an annual rate of 2. 4 percent. But unemployment was hovering at an uncomfortably high 6.2 percent in July, and 44. 000 additional jobs were axed from payrolls, marking the sixth month in a row the economy has lost jobs. One fault is that seemingly profligate spending ’on high tech during the ’90s boom. More than three years after the bust, it’s continuing to generate a productivity payoff inside companies. Even industries like entertainment and higher education, once thought to be largely immune to productivity improvements, have been revolutionized by digital media, online research tools, cell phones and e-mail. But that’s not the only reason for the problem. Over the last three years, American manufacturers have shipped 2. 6 million jobs to low-Wage countries like China. Meanwhile. a flood of white-collar jobs--like computer technicians and customer service reps--have gone to countries with well-educated work forces, such as India. There is of course a simple solution to all this-a hotter economy, with stronger demand that would force companies to hire workers. But the seven-point decline in July of the Consumer Confidence Index doesn’t offer much near-term hope. Some economists also worry that Bush’s deep tax cuts are "a very expensive way of getting an amount of stimulus that is too small," says Janet Yellen, a professor at the Haas School of Business who also chaired Clinton’s Council of Economic Advisers. The Bush administration responds by asking Americans to wait until the full effect of the cuts are felt and the economy kicks into a high gear growth rate of 3 percent to 4 percent. For the millions of Americans who are out of work, that day can’t come soon enough.

A:is a timely benefit. B:helps their business to be more competitive. C:restrains the job growth. D:hold back the GDP growth.

Text 4 IBM’s year-old, $ 2.5 billion computer-chip plant in East Fishkill, N. Y. , is a manufacturing marvel. Three-hundred robotic tools, six miles of networking cable and more computing power than NASA uses to launch the space shuttle all work together to produce tens of millions of chips a year-- each with circuitry 800 times thinner than a human hair. Not that you’ll find much human hair around the plant. Other chip plants need about 400 employees at all times to operate the Complex machinery. But today at East Fishkill, 100 engineers per shift oversee a totally automated production line. Last winter, when a fierce snowstorm sent everyone home early, the machines hummed along overnight without any problem. "The productivity increases for IBM are amazing," says Perry Hartswick, the senior program manager at the plant. Productivity improvements like those at IBM can be a boon in a healthy economy, helping to make American business more competitive abroad and keeping a lid on inflation as employees work harder to meet strong demand for their products. But today’s soaring productivity is having a harmful side effect: it’s holding back job growth. Last Thursday the Commerce Department reported that GDP grew at an annual rate of 2. 4 percent. But unemployment was hovering at an uncomfortably high 6.2 percent in July, and 44. 000 additional jobs were axed from payrolls, marking the sixth month in a row the economy has lost jobs. One fault is that seemingly profligate spending ’on high tech during the ’90s boom. More than three years after the bust, it’s continuing to generate a productivity payoff inside companies. Even industries like entertainment and higher education, once thought to be largely immune to productivity improvements, have been revolutionized by digital media, online research tools, cell phones and e-mail. But that’s not the only reason for the problem. Over the last three years, American manufacturers have shipped 2. 6 million jobs to low-Wage countries like China. Meanwhile. a flood of white-collar jobs--like computer technicians and customer service reps--have gone to countries with well-educated work forces, such as India. There is of course a simple solution to all this-a hotter economy, with stronger demand that would force companies to hire workers. But the seven-point decline in July of the Consumer Confidence Index doesn’t offer much near-term hope. Some economists also worry that Bush’s deep tax cuts are "a very expensive way of getting an amount of stimulus that is too small," says Janet Yellen, a professor at the Haas School of Business who also chaired Clinton’s Council of Economic Advisers. The Bush administration responds by asking Americans to wait until the full effect of the cuts are felt and the economy kicks into a high gear growth rate of 3 percent to 4 percent. For the millions of Americans who are out of work, that day can’t come soon enough.

A:a costly but effective way of solving the employment problem. B:a helpful attempt approaching tile job problem. C:worthless policy that will end in vain. D:an expensive attempt with limited effect.

（）是指在云计算基础设施上为用户应用软件提供部署和运行环境的服务。

A:SaaS B:PaaS C:IaaS D:HaaS