问题
单项选择题
If you were to pass a stopper on a wire rope，what should the stopper be made of（）.
A.Wire
B.Manila
C.Nylon
D.Chain
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
If you were to pass a stopper on a wire rope，what should the stopper be made of（）.
A.Wire
B.Manila
C.Nylon
D.Chain
参考答案：D
2Z(气)△H＜0，温度升高，气体平均相对分子质量减小，说法正确的是（ ）