设y=sin[f(x2)],其中f具有二阶导数,求

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问题:

设y=sin[f(x2)],其中f具有二阶导数,求

考点:普通考研考研数学(二)考研数学二
题型:问答题

Visitors to this country are normally admitted for six months, but foreign students can usually stay for one year. They must (54) an educational institution, and they are required to study for a (55) of fifteen hours a week on a daytime course. Prospective students have to show that they can afford their studies, and that they have sufficient (56) resources to support themselves (57) in this country.

In order to work here the foreigner needs a work permit, (58) must be applied for by his prospective employer. The problem here is that the Department of Employment has the right to grant or (59) these permits, and there is little that can be done (60) it; it would be extremely unwise for a foreign visitor to work (61) a permit, since anyone doing so is liable to immediate deportation (驱逐出境). There are some people from the European countries, who are often given (62) residence permits of up to five years. Some other people, such as doctors, foreign journalists, authors and others can work without permits, and foreign students are normally allowed to (63) part-time jobs while they are studying here.

57().

A.after 

B.since 

C.while 

D.before

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滑阀反馈式节流器的灵敏度()双面薄膜反馈式节流器。

A、不及

B、高于

C、等于

题型:问答题

怀疑有 * * 或膀胱损伤时()

A.血气分析

B.做胸腔穿刺检查

C.做腹腔穿刺检查

D.监测中心静脉压

E.放置导尿管检查

题型:问答题

乳酸脱氢酶同工酶有()。

A.2种

B.3种

C.4种

D.5种

E.6种

题型:问答题

《混凝土结构设计规范》规定:按螺旋箍筋柱计算的承载力不得超过按普通柱计算的承载力的1.5倍,这是为了______。

A.防止间接钢筋外面的混凝土保护层不致过早脱落

B.不发生脆性破坏

C.限制截面尺寸及保证构件的延性

D.防止因纵向弯曲影响致使螺旋筋尚未屈服而构件已经破坏

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