吊运大块或整体模板时，竖向吊运不少于（）吊点。
A.1个
B.2个
C.4个
D.6个
参考答案：B
It was_________ back home after the experiment.
A．not until midnight did he go
B．until midnight that he didn’t go
C．not until midnight that he went
D．until midnight when he didn’t go
位于脐下3寸的穴位为（）
A.关元
B.石门
C.气海
D.阴交
E.中极
