企业在选择培训方法时，不能单一地从企业利益方面考虑，还需要切实关注员工个人的需求，坚

Some people talk about immigration in terms of politics, some in terms of history. But the core of the matter is numbers. The Labor Department says that immigrants make up about 15 percent of the work force. It’s estimated that a third of those are undocumented workers. The Pew Hispanic Center estimates that one in four farmhands in the United States is an undocumented immigrant, and that they make up a significant portion of the people who build our houses, clean our office buildings and prepare our food.

America has become a nation dependent on the presence of newcomers, both those with green cards and those without. Business leaders say agriculture, construction, meatpacking and other industries would collapse without them.

Sure, it would be great if everyone were here legally, if the immigration service weren’t such a disaster that getting a green card is a life’s work. It would be great if other nations had economies robust enough to support their citizens so leaving home wasn’t the only answer. But at a certain point public policy means dealing not only with how things ought to be but with how they are. Here’s how they are: these people work the jobs we don’t want, sometimes two and three jobs at a time. They do it on the cheap, which is tough, so that their children won’t have to, which is good. They use services like hospitals and schools, which is a drain on public coffers, and they pay taxes, which contribute to them.

Immigration is never about today, always about tomorrow, an exercise in that thing some native-born Americans seem to have lost the knack for: deferred gratification. It’s the educated man who arrived in the Washington D. C., area and took a job doing landscaping, then found work as a painter, then was hired to fix up an entire apartment complex by someone who liked his work ethic. He started his own business and wound up employing others. Does it matter that he arrived in this country with no work visa if he is now supporting the nation’s economy

If any towns, whose aging populations were on the wane before the immigrants arrived, succeed in driving newcomers away, those who remain will find themselves surrounded by empty storefronts, deserted restaurants and houses that will not sell. It’s the civic equivalent of starving to death because you don’t care for the food. But at least everyone involved can tell themselves their town wasted away while they were speaking English.

What is the image of undocumented immigrants in the author’s opinion（）

A. illegal and need to be sent back to where they’re from

B. essential to the construction of US economy

C. encouraged to work illegally in US

D. enjoying the public services without contributing to them

一度房室传导阻滞心电图特点是（）

A.P-R间期恒定，部分P波后无QRS波群

B.部分P波后QRS波脱漏

C.P波与QRS波毫无关系

D.P-R间期延长

E.P波规律出现，PR间期逐渐延长

These are the apples and bananas, cut ___________ and put ___________ the blender.

A．up them, them into

B．them up, into them

C．them up, them into

D．up them, into them

WHO标准2000年18岁青年保持全口牙列完整率应是（）。

A．70%

B．75%

C．80%

D．85%

E．90%

以下业务网中继电路类型中，属于数据网中继电路的有：（）

A.DD

B.IP

C.PD

D.FR