武当山称为道教的发源地是从（）朝代开始的？
A.隋朝
B.唐朝
C.宋朝
参考答案：B
Last night we saw two movies, _______ was interesting.
A．both of which
B．neither of which
C．both of them
D．neither of them
某机超速调验危急保安器动做转速为3240r／min，已知调整螺母每改变30°动做转速变化105r／min，若要将动做转速调至3330r／min，问如何调整？
