厂内进一批含水率为15%的木板4吨,烘干后绝干木材为多少公斤?

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问题:

厂内进一批含水率为15%的木板4吨,烘干后绝干木材为多少公斤?

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手术中易引起体温升高()

A.髓内钉

B.钛夹

C.吻合钉

D.骨粘固剂

E.止血胶

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茯苓的功效是()

A.利水渗湿

B.利尿通淋

C.健脾补中

D.利湿退黄

E.宁心安神

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沉淀反应的反应曲线中,抗原抗体分子比例合适的范围称为

A.带现象

B.前带

C.后带

D.等价带

E.拖尾现象

题型:问答题 简答题

For an increasing number of students at American universities, Old is suddenly in. The reason is obvious: the graying of America means jobs. Coupled with the aging of the baby-boom (生育高峰) generation, a longer life span(寿命) means that the nation’s elderly population is bound to expand significantly over the next 50 years. By 2050, 25 percent of all Americans will be older than 65, up from 14 percent in 1995. The change brings many problems for government and society, of course. But it also creates career opportunities in medicine and health professions,  and in law and business as well. “In addition to the doctors, we’re going to need more sociologists, biologists, urban planners and specialized lawyers,” says Professor Edward Schneider of the University of Southern California’s (USC) School of Gerontology (老年学).

Lawyers can specialize in “elder law” which covers everything from trusts(信托) and estates to nursing-home abuse and age discrimination. Businessmen see huge opportunities in the elder market because the baby boomers, 74 million strong, are likely to be the wealthiest group of retirees(退休者) in human history. “Any student who combines an expert knowledge in gerontology with, say, an MBA or law degree will have a license to print money,” one professor says.

Margarite Santos is a 21-year-old senior at USC. She began college as a biology major but found she was “really bored with bacteria.” So she took a class in gerontology and discovered that she liked it. She says, “I did volunteer work in retirement homes and it was very satisfying.”

小题1:.“…Old is suddenly in” (Line 1, Para. 1) most probably means “_____”.

A.America has suddenly become a nation of old people

B.more elderly professors are found on American campuses

C.gerontology has suddenly become popular

D.American colleges have realized the need of getting older students小题2:Why can businessmen make money in the emerging elder market?

A.The elderly possess an enormous purchasing power

B.They can employ more gerontologists

C.Retirees are more generous in spending money

D.There are more elderly people working than before小题3:Who can make big money in the new century according to the passage?

A.Retirees who are business-minded

B.The volunteer workers in retirement homes

C.Professionals with a good knowledge of gerontology

D.College graduates with an MBA or law degree小题4:.It can be seen from the passage that the expansion of America’s elderly population ______.

A.will provide good job opportunities in many areas

B.will cause a heavy burden on society

C.may lead to nursing home abuse and age discrimination

D.will create new fields of study in universities

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频率低于()Hz时,发电厂应不待调度指令,将发电机按事故过负荷能力接带负荷。

A、49.5

B、49

C、48.5

D、48

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