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问题 多项选择题

《安全生产法》规定，生产经营单位未为业人员提供（）的劳动防护用品的，责令限期整改。

A、符合国家标准的

B、符合行业标准

C、防火防爆

D、防暑降温

答案

参考答案：A, B

选择题
Today we have too many choices of communication through advanced technology, but we seem           the joy of communicating face to face.

A. losing    
B. to be losing  
C. to be lost  
D. having lost  
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单项选择题

John Cupp, CFA, has several hundred clients. The values of the portfolios Cupp manages are approximately normally distributed with a mean of $ 800000 and a standard deviation of $ 250000. The probability of a randomly selected portfolio being in excess of $1000000 is :（）

A. 0.3773.

B. 0.6227.

C. 0.2119.
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