试题与答案

一水池有三个流量相同的注排两用水管,开一个水管一个小时注排水50立方米.假设先开

题型:填空题

题目:

一水池有三个流量相同的注排两用水管,开一个水管一个小时注排水50立方米.假设先开一个进水管注满半池水,再同时开三个进水管注满另一半池水;排水时,先用
2
3
时间开三个水管同时排水,再用
1
3
时间只开一个水管排水,把池中水排尽,这样排完一池水所花时间比前面注满一池水少用2个小时,水池的容积是______立方米.

答案:

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题型:阅读理解

Read and judge the sentences. (读短文,判断下列每个句子是否正确)

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( ) 1. The forest is beautiful and big. 

( )2. There are two big birds in the forest.

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(     )5. Lucy and Joyce are very happy in the forest.

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