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问题 解答题
下面是贝贝统计的本组7名同学刷一次牙水龙头所开的时间。
时间/秒195210195200180215205
1．平均每人刷一次牙水龙头的流水时间是多少秒？
2．若每10秒钟流失的水是500毫升，贝贝每天刷两次牙，将用水多少千克？（1000毫升水重1千克）
3．四（1）班有50名同学，一年因刷牙将用去多少水？ 
答案

1．200秒；2．20千克；3．365000千克

选择题

下列能源中，会对环境造成污染的是   

A．氢能

B．太阳能

C．石油

D．风能
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改错题

下面文中共有10处语言错误，错误涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线(\)划掉。

修改：在错的词下划一横线，并在其下面写出修改后的词。

注意：1. 每处错误及其修改均仅限一词；

2. 只允许修改10处，多者（从第11处起）不计分。

It seems that there are a larger number of beggar in the

 streets than there used to be. I don’t know how we should help

 it or not. Once I gave some money to a beggar who looks

 poor. However, minutes later, I saw him bought some

cigarettes. It really shocked at me. In my opinion, anyone who

work hard can make a living. I’m afraid that giving them

money isn’t best way to help them. Maybe the government

can take some action to helping them. Anyway, if they

 want to live a better living, they should learn to depend

 on themselves.

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