问题
问答题 简答题
堆料皮带速度2m/s，堆料机大车行走沿堆料皮带运行方向速度30m/min，求堆料机大车行走逆向速度.
答案
参考答案：1/V=1/V1+1/V0，V=V1V0/V1+V0=25m/min
堆料机大车行走逆向速度为25m/min.
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堆料皮带速度2m/s，堆料机大车行走沿堆料皮带运行方向速度30m/min，求堆料机大车行走逆向速度.
参考答案：1/V=1/V1+1/V0，V=V1V0/V1+V0=25m/min
堆料机大车行走逆向速度为25m/min.
补全对话（共5小题；每小题1分，满分5分） 阅读下面对话，从方框内7个选项中选择5个恰当的句子完成此对话，使其意思完整。 A: Look, there is a bag under the tree. 小题1: _____________ B: I don’t know. Let’s have a look. Oh, there is a soccer in it.小题2: _____________ A: I don’t think so. Many girls enjoy playing soccer now. 小题3: _____________ B: Yes, there is an English book and a notebook in it. A: Open them and see. 小题4:_____________ B: OK, you are so clever. Yes, there is an English name here—David. A: I know it must belong to a boy. B: Of course. 小题5: _____________ A: There’re some other words here——Class Eight, Grade Nine. Let’s go to find him.
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