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问题 单项选择题 A1/A2型题

可用于染肌肉横纹的苏木精液是（）。

A.Mallory磷钨酸苏木精液

B.Harris苏木精液

C.Weigert铁苏木精液

D.Mayer苏木精液

E.Verhoeff铁磺苏木精液

答案

参考答案：A

单项选择题

An analyst has recently determined that only 60 percent of all U. S. pension funds have holdings in hedge funds. In evaluating this probability, a random sample of 50 U. S. pension funds is taken. The number of U. S. pension funds in the sample of 50 that have hedge funds in their portfolio would most accurately be described as a:（）

A. binomial random variable.

B. Bernoulli random variable.

C. continuous random variable.
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单项选择题

烧伤的致伤因素中，最常见的是（）

A.电烧伤

B.热力烧伤

C.生石灰烧伤

D.磷烧伤

E.酸、碱烧伤
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