喷涂作业前，严禁将喷枪口（）.
A.对人
B.对缷压
C.先排浆
D.都可以
参考答案：A
—When should I hand in my paper?
—Your paper must ______ as soon as the bell ______. [ ]
A. hand in; rings
B. hand in; will ring
C. be handed in; will ring
D. be handed in; rings
( )不是团体咨询效果评估的方法。
A．行为计量法
B．心理测验法
C．调查问卷法
D．心理物理法
