EM是

A:化学文摘 B:医学文摘 C:医学索引 D:国际药学文摘 E:中国药学文摘

下列关于EM的说法正确的是（）。

A:建立Internet技术和其他电子化通信技术的基础上 B:通过静态的web应用程序吧交易双方集成在一起 C:是一个虚拟的交易环境 D:EM中的交易主体可以通过EM提供的电子化交易信息和交易工具建立起点对点和一对多的交易通道

需求收入弹性Em的取值为多少的时候商品是奢侈品？（）

A:Em<0 B:Em>0 C:Em>1 D:1>Em>0

指令EXEMP.RP=ALL，EM=ALL；输出的数据包括哪些？（）

A:EM的状态 B:EM所带的设备 C:EM受控的RP的状态 D:EM受控于哪个RP E:EM受控的RP的类型

荧光物质发射波长λem和激发波长λex的关系为（）

A:λem>λex； B:λem＝λex； C:λem<λex； D:不确定

某工程网络计划图中，D工作的紧后工作为E和F，其持续时间分别为6 d、3 d、2 d，D工作第8天开始，E和F工作均于第18天必须最迟完成，则以下参数计算正确的是( )。

A:D工作的自由时差为1 d B:D工作的自由时差为0 d C:E工作的总时差为0 d D:D工作的最迟开始时间为第10天 E:F工作的总时差为2 d

In most large Japanese companies, there is a policy of lifetime employment. What this means is that when people leave school or university to join an enterprise, they can expect to remain with that organization until they retire. In effect, the employee gets job security for life, and can only be fired for serious mistakes in work. Even in times of business recession, he or she is free from the fear of being laid off.
One result of this practice is that the Japanese worker identifies closely with his company and feels strong loyalty to it. By working hard for the company, he believes he is safeguarding his own future. It is not surprising that devotion to one’s company is considered a great virtue in Japan. A man is often prepared to put his firm’s interests before those of his immediate family.
The job security guaranteed by this system influences the way employees approach their work. They tend to think in terms of what they can achieve throughout their career. This is because they are not judged on how they are performing during a short period of time. They can afford to take a longer perspective than their Western counterparts.
This marriage between the employee and the company the consequence of lifetime employment—may explain why Japanese workers seem positively to love. the products their company is producing and why they are willing to stay on after work, for little overtime pay, to participate in earnest discussions about the quality control of their products.

A:how lifetime employment works in Japan B:what benefits lifetime employment has brought to Japanese workers C:what lifetime employment is D:how lifetime employment is viewed

Lifetime Employment In Japanese Companies
In most large Japanese companies, there is a policy of lifetime employment. What this means is that when people leave school or university to join an enterprise, they can expect to remain with that organization until they retire. In effect, the employee gets job security for life, and can only be fired for serious mistakes in work. Even in times of business recession, he or she is free from the fear of being laid off.
One result of this practice is that the Japanese worker identifies closely with his company and feels strong loyalty to it. By working hard for the company, he believes he is safeguarding his own future. It is not surprising that devotion to one’s company is considered a great virtue in Japan. A man is often prepared to put his firm’s interests before those of his immediate family.
The job security guaranteed by this system influences the way employees approach their work. They tend to think in terms of what they can achieve throughout their career. This is because they are not judged on how they are performing during a short period of time. They can afford to take a longer perspective than their Western counterparts.
This marriage between the employee and the company - the consequence of lifetime employment - may explain why Japanese workers seem positively to love the products their company is producing and why they are willing to stay on after work, for little overtime pay, to participate in earnest discussions about the quality control of their products.

A:how lifetime employment works in Japan. B:what benefits lifetime employment has brought to Japanese workers, C:what lifetime employment is. D:how lifetime employment is viewed.

简支板下部纵向受力钢筋伸入支座的长度l_a不应小于( )。

A:5d B:10d C:5d且不小于50mm D:5d且小于100mm