问题
填空题
写出两个无理数，使这两个无理数的积为有理数，那么这两个无理数可以是 _________ 和 _________ ．
答案
形如b
和c
和或者
+
和
﹣
等（答案不唯一）
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写出两个无理数，使这两个无理数的积为有理数，那么这两个无理数可以是 _________ 和 _________ ．
形如b和c和或者+和﹣等（答案不唯一）
你肯定听说过”早睡早起身体好” 这句著名的俗语吧。为什么这么说呢？请看下文找找依据吧，然后让自己养成良好的生活习惯。 There is an old saying. It tells us we must go to bed 26 and get up early in the 27 .Then we will be 28 .We will also be rich and 29 .That is right .The body must have enough sleep to be healthy .Children of young age should have 30 hours sleep every night. Children who do not have enough sleep 31 do their work well and 32 may not be healthy. The body also 33 exercise .Walking ,running ,jumping and playing games are all exercise .Exercise keeps the body strong . Exercise also helps the blood (血液) to move around inside the body. It’s very 34 .Our blood moves to all parts of our body. The head also needs blood So exercise also helps us to __35___ better.
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