集装箱车的基本记号是（）。
A.T
B.K
C.J
D.X
参考答案：D
— Could you please tell me in today's newspaper?
— Sorry, .
A. something special; special nothing
B. special something; special nothing
C. anything special; something special
D. something special; nothing special
压缩环的主要作用有（）。
A．密封
B．散热
C．导向
D．A＋B
