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问题 单项选择题

微型计算机键盘上的＜Backspace＞键称为( )。

A．控制键

B．上档键

C．退格键

D．功能键

答案

参考答案：C

解析： 在计算机中，＜Ctrl＞和＜Alt＞是控制键，＜Shift＞是换档键或称交替换档键，＜Backspace＞是退格键。

单项选择题

属于流式细胞式尿沉渣分析仪检测原理的是

A．流式细胞术和电阻抗原理

B．比色原理

C．免疫比浊法

D．尿沉渣镜检影像分析原理

E．单克隆抗体法
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单项选择题

Researchers studying sets of identical twins who were raised apart in dissimilar environments found that in each case the twins were similar in character, medical history, and life experiences. The researchers saw these results as confirmation of the hypothesis that heredity is more important than environment in determining human personalities and life histories.
The existence of which of the following would tend to weaken the support for the hypothesis above most seriously

A．A set of identical twins raised together who are shown by appropriate tests to have very similar value systems.

B．A pair or identical twins raised apart who differ markedly with respect to aggressiveness and other personality traits.

C．A younger brother and older sister raised together who have similar personalities and life experiences.

D．A mother and daughter who have the same profession even though they have very different temperaments.

E．(E) A pair of twins raised together who have similar personality traits but different value systems.
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