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问题 选择题

Make sure that your computer room is 100%________of insects because they can really cause trouble to your machine.

A．absent

B．rare

C．free

D．short

答案

答案：C

单项选择题

In a certain flower shop, which stocks four types of flowers, there are as many violets as carnations, and  as many tulips as violets. If there are equal numbers of roses and tulips, what percent of the flowers in the shop are carnations ？（）

A.10%

B.33%

C.40%

D.50%

E.60%
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多项选择题

设备安装流程的文档流向表中规定，下列哪些文档是需要用户签字确认的？（）

A、开工协调会议纪要

B、工程现场例会表

C、设计方案更改申请表

D、初验证书

E、工程备忘
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