试题与答案

回答问题(共3小题;每小题2分,满分6分) 阅读下面短文,根据第58至第60小题

题型:完形填空

题目:

回答问题(共3小题;每小题2分,满分6分)

阅读下面短文,根据第58至第60小题的具体要求,尽可能简要回答问题,并将答案转写到答题卡上。

In China, more and more middle school students are getting shorter sleeping time than before. More students sleep less than nine hours every night, because they have much homework to do. Some homework is given by their teachers, and some by their parents. Also, some students don’t know how to save time. They are not careful enough while they do their homework, so it takes them a lot of time. Some students spend too much time watching TV or playing computer games. They stay up very late. Some students have to get up early every morning on weekdays to get to school on time by bus of by bike . It can be a long way from home to school. It will probably make them sleepy during school hours.

Schools and parents should cut down some of the homework so that our children can enjoy more than nine hours of sleep every night for their health. For children, they should make the most (best use) of their time. When they have enough time for sleeping they will find it much better for both their study and health.

58. What make most students sleep less than nine hours every night? (回答词数不超过5个)

________________________________________________________________________

59. According to the article, who else gives children some homework to do except their teachers?

(回答词数不超过5个)

________________________________________________________________________

60. What is the possible result if the students have enough time for sleeping? (回答词数不超过14个)

_______________________________________________________________________

答案:

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题型:填空题

取粉末状大理石样品和块状大理石样品各12克,分别与足量的稀盐酸在烧杯中混合后充分反应,测得反应生成气体的质量(m)与反应时间(t)的数据如下表所示:

实验序号反应时间t/s0510152025303540
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回答问题:

Ⅰ.粉末状大理石和盐酸反应所对应的实验序号是______(填“①”或“②”);

Ⅱ.求实验①中参加反应的碳酸钙的物质的量(用化学方程式计算);

Ⅲ.实验①中大理石样品的纯度(即大理石中碳酸钙的质量分数)为______.(精确到0.1%)

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