结构化查询语言（SQL）
结构化查询语言（SQL）
i-drop是一种拖放方法，可以提供以下功能（）。
A:选择i-drop内容的类型 B:指定下载的关联数据文件 C:查看i-drop内容的日志文件 D:把图形文件从网页拖动到图形区域中
下列关于软切换去门限参数T_DROP的相关描述，正确的有（）。
A:当激活集或候选集的导频强度降至T_DROP以下，移动台将为该导频开启切换去掉定时器 B:如果T_DROP设置过高，则可能会导致有用导频被迅速从激活集剔除，从有用信号变成干扰，从而导致掉话 C:如果T_DROP设置过低，则可能会导致过多的软切换，从而影响前向链路的容量 D:在设置T_DROP时必须考虑T_TDROP的设置，因为前者相对于T_ADD而言是功率迟滞，而后者引入的是时间迟滞
Children start out as natural scientists, eager to look into the world around them. Helping them enjoy science can be easy ;there’s no need for a lot of scientific terms or expensive lab equipment. You only have to share your children’s curiosity. Firstly,listen to their questions. I once visited a classroom of seven-year-olds to talk about science as a job. The children asked me" textbook questions" about schooling, salary and whether I liked my job. When I finished answering, we sat facing one another in silence. Finally I said, "Now that we’ve finished with your lists, do you have questions of your own about science"
After a long pause ,a boy raised his hand," Have you ever seen a grasshopper(蚱蜢) eat When I try eating leaves like that, I get a stomachache. Why"
This began a set of questions that lasted nearly two hours.
Secondly, give them time to think. Studies over the past 30 years have shown that, after asking a question, adults typically wait only one second or less tor an answer, no time for a child to think. When adults increase their" wait time" to three seconds or more, children give more logical, complete and creative answers.
Thirdly, watch your language. Once you have a child involved in a science discussion, don’t jump in with" That’s right" or" Very good". These words work well when it comes to encouraging good behavior. But in talking about science, quick praise can signal that discussion is over. Instead, keep things going by saying" That’s interesting" or" I’d never thought of it that way- before", or coming up with more questions or ideas.
Never push a child to" Think". It doesn’t make sense, children are always thinking, without your telling them to. What’s more, this can turn a conversation into a performance. The child will try to find the answer you want, in as few words as possible, so that he will be a smaller target for your disagreement.
Lastly, show;don’t tell. Real-life impressions of nature are far more impressive than any lesson children can learn from a book or a television program. Let children look at their fingertips through a magnifying glass, and they’ll understand why you want them to wash before dinner. Rather than saying that water evaporates, set a pot of water to boil and let them watch the water level drop.
The author mentions all of the following techniques for adults to share with their children’s curiosity except that adults should______.
A:tell their children stories instead of reciting facts B:offer their children chances to see things for themselves C:be patient enough when their children answer questions D:encourage their children to ask questions of their own
The term e-commerce refers to all commercial transactions conducted over the Internet, including transactions by consumers and business-to-business transactions. Conceptually, e-commerce does not (1) from well-known commercial offerings such as banking by phone, "mail order" catalogs, or sending a purchase order to supplier (2) fax. E-commerce follows the same model (3) in other business transactions; the difference (4) in the details.
To a consumer, the most visible form of e-commerce consists (5) online ordering. A customer begins with a catalog of possible items, (6) an item, arranges a form of payment, and (7) an order. Instead of a physical catalog, e-commerce arranges for catalogs to be (8) on the Internet. Instead of sending an order on paper or by telephone, e-commerce arranges for orders to be sent (9) a computer network. Finally, instead of sending a paper representation of payment such as a check, e-commerce (10) one to send payment information electronically.
In the decade (11) 1993, e-commerce grew from an (12) novelty to a mainstream business influence. In 1993, few (13) had a web page, and (14) a handful allowed one to order products or services online. Ten years (15) , both large and small businesses had web pages, and most (16) users with the opportunity to place an order. (17) , many banks added online access, (18) online banking and bill paying became (19) . More importantly, the value of goods and services (20) over the Internet grew dramatically after 1997.
A:Instead B:Nevertheless C:However D:Besides
Instead of researching and writing their papers, some students ______.
A:ask other students to write their papers B:draw pictures instead C:copy from reference books D:copy papers or large parts of papers from the Internet
Paper or Plastic
Take a walk along the Chesapeake Bay, and you are likely to see plastic bags floating in the water. They have made their (51) into local waterways and, from there, into the bay, where they can (52) wildlife. Piles of them show up in landfills (垃圾填埋地) and on city streets. Plastic bags also take an environmental toll (代价) in the (53) of millions of barrels of oil expended every year to produce them.
Enter Annapolis and you will, see plastic bags (54) free in department stores and supermarkets. Alderman (市议员) Sam Shropshire has introduced a well-meaning (55) to ban retailers from distributing plastic shopping bags in Maryland’s capital. instead, retailers would be required to (56) bags made of recycled paper and to sell reusable bags. The city of Baltimore is (57) a similar measure. Opponents of the (58) , however, argue that paper bags are harmful, too: They cost more to make, they (59) more resources to transport, and recycling them causes more pollution than recycling plastic. The argument for depriving Annapolis residents (60) their plastic bags is far from accepted. Everyone in this (61) is right about one thing: Disposable shopping bags of any type are wasteful, and the best outcome would be for customers to (62) bags instead. Annapolis’s mayor is investigating how to hand out free, reusable shopping bags to city residents, a proposal that can proceed (63) of whether other bags are banned. A less-expensive alternative ,would be to encourage retailers to give (64) to customers Who bring their own reusable bags. And this policy would be more (65) if stores imitated furniture mega-retailer (超大零售商). Ikea and charged for disposable bags at the checkout counter. A broad ban on the use of plastic shopping bags is not the answer.
A:instead B:because C:regardless D:careless
下面的短文有15处空白，请根据短文内容为每处空白确定1个最佳选项。
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A:instead B:because C:regardless D:careless
{{B}}第三篇{{/B}}
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Malnutrition (营养不良) ? ?A new World Bank report warns that children who don’t get enough good food in the first two years of life suffer lasting damage. They may be underdeveloped or underweight. They may suffer from poor health or limited intelligence. In addition, poorly nourished children are more likely to drop out of school and earn less money as adults. ? ?The report notes that too little food is not the only cause of poor nutrition. Many children who live in homes with plenty of foods utter for other reasons. For example, the study says that mothers often fail to give their newly born babies their first breast milk. This milk-like substance is called colostrum. It is full of nutrients that improve a baby’s ability to fight infections and disease. ? ?The study also links malnutrition to economic growth in poor countries. A lack of nutrition in early children can cost developing nations up to three percent of their yearly earnings. Many of these same countries have economies that are growing at a rate of two or three percent yearly. The study suggests that poor countries could possibly double their economic growth if they improved nutrition. ? ?Africa and South Asia are affected the most by poor nutrition. The study says about half of all children in India do not get enough good food. The World Bank study also notes that rates of malnutrition in South Asia are almost double those in central and southern Africa. Other parts of world are also severely affected, including Indonesia, Uzbekistan, Yemen, Guatemala and Peru. ? ?The study recommends that developing countries change their policies to deal with malnutrition. Instead of directly providing food, the study suggests educational programs in health care. ? ?World Bank nutrition specialist Meera Shekar said the period of life between pregnancy and two years was extremely important. Governments with limited resources should take direct action to improve nutrition for children during this period. |
A:They may not get enough good nutrition in the first two years. B:They may be underdeveloped or underweight. C:They may feel painful from poor health or limited intelligence. D:They mybe more likely to drop out of school or earn less money as adults.
We shall supply you ______ Sewing Machines, model JBi-1 instead of JBO-1.
A./ B．in
C．of D．with
A:of B:with C:in D:We shall supply you ______ Sewing Machines, model JBi-1 instead of JBO-1. E:/
