采煤机检修后空转试运转，首先应该合上截割部（）手把。
A.开关
B.操作
C.启动
D.离合器
参考答案：D
初次申领的机动车驾驶证的有效期为6年。
What does the man mean [A] He wants to go with there, [B] He is not interested in going with them. [C] He will invite his friends and go with them.
