下料翻板阀配重的作用是什么？为什么要处于闪动状态？

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问题问答题简答题

答案

参考答案：

一方面防止漏风降低收尘效率，另一方面是保持下料连续，防止一股一股下料，闪动次数为每分钟20～30次。

听力题

单词拼写

小题1:His illness a_________ for his being absent from work.

小题2:I climbed into bed and p____ the blanket over my head.

小题3:Darwin’s t_____ of evolution(进化)is based on the survival of the fittest.

小题4:The clouds have b_____ out the sun.

小题5:You must first s______ their permission before publishing their names.

小题6:The director told the actors that he would shoot the _______(场景)in the morning.

小题7:The 　　　　(混合) of the two drinks tastes good.

小题8:Can’t you see the mountains in the ________(远处)？

小题9:The garden is ______(围绕) by a high wall.

小题10:They often ______(聊天) online.

填空题

生物技术药物大多数属（）、（）、（）。