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问题 单项选择题

汽车是起重机的支腿处必须坚实，在起吊重物前，应对支腿加强观察，看看有无陷落现象，又是为了保证安全使用，会增铺垫道木，其目的是（）

A.加大承压面积

B.减小承压面积

C.减小对地面的压力

D.增大对地面的压力

答案

参考答案：A

解答题

分别用m，n表示任意一正整数，若（-2）m＞0，（-2）n＜0，求（-1）m+（-1）n-3m+（-3）m的值．
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单项选择题

Whenever an investment management firm presents investment performance is compliance with the Global Investment Performance Standards (GIPS), it must start how it defines itself as a firm. Under GIPS, a firm may define itself for the purpose of claiming GIPS compliance using any of the following options EXCEPT when:()

A. an entity is registered with the appropriate national regulatory authority overseeing the entity’s investment management activities.

B. all assets are managed to one or more base currencies.

C. the subsidiary or division of a company claims GIPS compliance when the parent company is GIPS compliant.
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