螺旋给煤机由哪些组成?
参考答案:
由给煤机支架,双头螺纹旋转体,机身箱体,驱动装置。
根据语境,用恰当的语言完成对话。
A: Hello, Ken. How was your summer holiday?
B: Too terrible.
A: 小题1:_____________________________?
B: I planned to go to Guilin for my holiday. But it rained heavily there, so I had to stay at home.
A: 小题2: ! Then what did you do at home?
B: I just did my homework every day. It was very boring. 小题3:___ _______________, Alice?
A: I went to Qingdao with my parents.
B: That sounds good. 小题4:__________________________________?
A: It was hot and humid but sometimes it was cool.
B: 小题5:_______________________________?
A: Yes, we had great fun.
如图所示,用细线把很干净的玻璃板吊在弹簧测力计的下面,记下测力计的读数;然后使玻璃板水平接触水面,稍稍向上拉玻璃板,在玻璃板离开水面之前,弹簧测力计读数______(填“变大”、“变小”或“不变”),这个现象说明______.