不属于盘车装置组成的是()
A.盘车泵
B.电动机
C.电磁阀
D.凋节阀
参考答案:D
We don''t plan to go to the concert, and so they don''t .
A.so do they
B.they don't too
C.neither don't they
D.they don't either
在下图中,有一个投影面缺失投影线,缺失投影线的条数为()
A、1条
B、2条
C、3条
D、4条