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问题 选择题

某成人患上了地方性甲状腺肿大病，主要是由于缺少哪种无机盐造成的（  ）

A．钙

B．铁

C．碘

D．钠

答案

答案：C

题目分析：地方性甲状腺肿大不是缺钙引起的，故A错；不是缺铁引起的，故B错；是由于饮食中缺碘引起的，故C正确；不是缺钠引起的，故D错。

完形填空

When you are in England you must be very careful in the streets __1._____ the traffic drives on the left. Before you cross a street you must look to the right first __2._____ then the left. In the morning and in the evening when people go to or come from _3.______, the streets are very busy. Traffic is most __4._______ (danger) then.

When you go by bus in England, you have to be careful, __5.______. Always remember that the traffic moves on the left. So you must be careful. __6._______ (have) a look first, or else you will go __7.___________ wrong way.

In many English cities, there are big buses __8.__________ two floors. You can sit on the __9.________ (two) floor, from __10._______ you can see the city very well. It’s very interesting.

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单项选择题

以下（）属于寒性的食物。

A、马齿苋

B、干姜

C、韭菜

D、肉桂
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