ZYJ7电液转辙机开闭器拉簧拉力过大或过小都不能保证接点顺利转换。()
参考答案:错
187. The actor is very forgetful. He often forgets his_____and his group can’t work regularly.
A.line
B.litter
C. license
D.Lines
下列哪一种形态的肿块,癌的可能性最大()
A. * * 状
B.肿块大
C.有较长的蒂
D.蕈状
E.火山口状溃疡