连墙件、通长水平杆、剪刀撑等必须在脚手架拆卸到相关的门架时方可拆除，严禁先拆。（）
参考答案：对
―I am really struck by your spoken English. You speak so fluently. Have you been abroad?
―Yes. I ______ in London for two years.
A．have stayed
B．stayed
C．had stayed
D．have been staying
人参与莱菔子同服，莱菔子可以降低人参的补气作用，这种配伍关系属于（）
A.相须
B.相使
C.相恶
D.相反
E.相畏
