脚手架底座底面标高宜高于自然地坪50mm。（）
参考答案：对
He cut off half his right arm______ a knife ______the dangerous situation.
A．with , under
B．with, in
C．in, in
D．in, under
“举其仇，不是谄媚；立其子，不是营私；立其偏，也不是结党。不偏不倚，公公正正”赞的是（）？
