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问题 单项选择题

患者李某，男，40岁，术中输血400ml，6个月后因结膜黄染、食欲不振就诊，查为丙肝，由于接受了被污染的血制品。这种情况属于（）。

A.环境感染

B.交叉感染

C.自身感染

D.医源性感染

E.不属于医院感染

答案

参考答案：D

单项选择题

You are the project manager for software development project．The feasibility study can start any time and takes 1 week and requirement gathering takes 2 weeks which can start only after feasibility study．The design and test plan development can start in parallel after the requirements gathering．Test plan preparation takes 8 weeks followed by a review by the customer and the time estimated for review is 1 week．After the review，Test data preparation takes 6 weeks．Design takes 6 weeks and it is followed by development and unit testing，for one module it takes 2 weeks and for the other module it takes 2 weeks．There are no dependencies between modules and they can be developed simultaneously．After test data preparation and development and unit testing of both the modules，there is 2 weeks system testing．What is duration of the critical path ？（）

A．14 week

B．15 week

C．20 week

D．19 week
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单项选择题

There was（）of complete silence.

A．an instant

B．hours

C．three minutes

D．seconds
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