YJ17卷烟机调整大压板与烟枪间隙前，应将紧固螺钉拧回到底。
参考答案：错
---Now, have you finished your work yet?
--- Yes, I _______ it when you came.
A．have finished
B．finish
C．had finished
D．would finish
工作面透水一般有一些征兆，若煤壁结有水珠的现象叫（）
A、挂汗
B、挂红
C、水叫
