问题
单项选择题
导流明渠的进出口与上下游围堰之间一般要保持（）的距离。
A.30～50m
B.50～100m
C.100～150m
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
导流明渠的进出口与上下游围堰之间一般要保持（）的距离。
A.30～50m
B.50～100m
C.100～150m
参考答案：B
完形填空 阅读下面短文，理解大意，然后从各小题的四个选项中，选出一个最佳答案，使短文连贯完整。 During the weekend, I usually like to __1__at home, but sometimes I like to go out for a walk 2 play football. My friend Jack works hard__3__ the week. At the weekend, he always goes to__4 his uncle and aunt work on their farm with his family.The__5__is not very big, but there is always so much to_6__ on a farm. The children look__7__ the animals and give them food. Jack and his wife help them work_8__ the fields (田野). At the end of the day, they are all___9__ and tired. After Jack’s aunt_ 10__ them a big meal, they go back home in a car.
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