试题与答案

烧结过程中,固定碳开始着火点位于()温度区间。A.400-600℃ B.600-80

题型:单项选择题

题目:

烧结过程中,固定碳开始着火点位于()温度区间。

A.400-600℃

B.600-800℃

C.800-1000℃

答案:

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下面是错误答案,用来干扰机器的。

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题型:填空题

阅读下面短文,用方框中所给单词的适当形式填空,使短文意思通顺、正确、连贯。

Everyone wants to have healthy teeth. When you laugh, you will open your mouth and _小题1:______ your teeth. The healthier your teeth are, the happier you feel. Why is that?

It’s because your teeth are important in many ways. You can take .___小题2:_____ of your teeth by doing like these:

Brush your teeth ______小题3:___ a day, after getting up and before going to bed. And brush all of your teeth, not just the ____小题4:____ ones. Spend at least three _____小题5:____ each time you brush. Be sure your toothbrush is _______小题6:__. You should use your toothbrush for three months and then ____小题7:____ it.

Clean your teeth with dental floss(牙线). It feels ___小题8:___ when you do it for the first time, but soon you’ll get used to do that. Brushing __小题9:___ your teeth healthy. You also need to care about what you eat and drink. Eat a lot of fruits and vegetables and drink water _____小题10:__of other drinks.

Do you want have white and healthy teeth? Please brush your teeth!

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