题目内容

RIP动态协议定时更新路由，每隔（）秒更新一次。

A. 90
B. 60
C. 40
D. 30

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全国人民代表大会每届任期( )年。

A. 2
B. 3
C. 5
D. 10

治湿热黄疸，首选（）

A. 茵陈蒿
B. 虎杖
C. 秦艽
D. 郁金

In the UK, people are eating more

A. chocolate.
B. dark chocolate.
C. milk chocolate.

______ are trying hard to prove that chocolate can be good for you.

A. Manufacturers
B. Scientists
C. Advertisers