模具V形槽开口是折弯工件厚度的()
A.4倍
B.6倍
C.8倍
D.10倍
参考答案:C
—What’s the market ______ of their car in China?
—About 18 percent at present.
A.share
B.number
C.sales
D.figure
100吨至300吨之间的船艇应悬挂()号国旗。
A、6
B、5
C、4
D、3