问题
解答题
一个圆锥形沙堆，高是1.8米，底面直径是20米．如果工人师傅用容积是0.7立方米的小推车运这堆沙子，要运多少车？（根据实际情况取近似值，得数保留整数）
答案
3.14×(
)2×1.8÷0.7，20 2
=3.14×100×1.8÷0.7，
=314×1.8÷0.7，
=565.2÷0.7，
≈808（车）；
答：要运808车．
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一个圆锥形沙堆，高是1.8米，底面直径是20米．如果工人师傅用容积是0.7立方米的小推车运这堆沙子，要运多少车？（根据实际情况取近似值，得数保留整数）
3.14×(
)2×1.8÷0.7，20 2
=3.14×100×1.8÷0.7，
=314×1.8÷0.7，
=565.2÷0.7，
≈808（车）；
答：要运808车．
More and more Americans are going to work by bike. Do you know why more people are 1 bikes to work? We can answer the question in 2 ways. First, bikes don’t need gasoline (汽油), so it takes 3 money to use them. Second, a bike doesn’t 4 much space (空间), so it is 5 to find a place for it. And riding a bike is good for one’s 6 . People often drive their 7 to offices or to shops, but now people think riding bikes is a good way of doing sports. That’s 8 more Americans are now riding to work 9 bike, and they are 10 their own cars at home.
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