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问题 单项选择题

尿液分析仪检查尿液标本，须在多少时间内完成（）

A.3h

B.12h

C.24h

D.6h

E.2h

答案

参考答案：E

解析：尿液分析仪检查尿液标本，须在2h内完成。

解答题

A={x|a≤x≤a+3}，B={x|x＜-1或x＞5}，分别就下面条件求a的取值范围．

①A∩B=∅，②A∩B=A．
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单项选择题

During the last few years, it has been realized that maintenance of programs is more expensive than development, so reading of programs by humans is as important as (67) them.

A．editing

B．writed

C．written

D．writing
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