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问题 单项选择题

金瓷基底冠进行氧化处理时，理想的氧化层应为多厚

A．0.05～0.1μm

B．0.2～2μm

C．0.1～0.2μm

D．2～2.5μm

E．2.5～3μm

答案

参考答案：B

单项选择题

Gus Hayden, CFA, has developed a mutual fund selection product based on historical information from 2000-2010 period and performs a hypothesis test about performances of different styles. In order to minimize the probability of both Type Ⅰ and Type Ⅱ error, Hayden should increase the:（）

A. the power of a test.

B. level of significance.

C. sample size.
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单项选择题 B型题

血友病A（）。

A.APTT延长，PT正常，加正常新鲜血浆能纠正

B.APTT延长，PT延长，TT延长，加正常血浆不能纠正

C.APTT正常或延长，PT延长，加正常血浆能纠正

D.APTT正常，PT正常，TT延长，加甲苯胺蓝能纠正

E.APTT正常，PT正常，TT延长，加正常血浆能纠正
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