涂打()标记的车辆,表示禁止进入机械化驼峰。
A.0
B.@
C.1
参考答案:B
—I'd like ________ the after-school club, but I'm not sure what I should do.
—What do you like ________?[ ]
A. to join, do
B. to join, doing
C. joining, to do
D. joining, doing
不锈钢管道穿墙及穿楼板时应加装套管,其间隙不应小于()咖并填塞绝缘物,绝缘物中不应含有铁质杂质。
A.5
B.10
C.15
D.20