排队做操时，从前面数小明排第8，从后面数排第3，这一列一共有多少人？
10人
Have you finished your homework?
—________Just half of it．How about you?
A．Not at all
B．Not likely
C．Not a bit
D．Not yet
国产18号有砟道岔辙叉组件长度为（）m？
A.20.992
B.24.614
C.23.392
D.25.718
