问题
选择题
-Why did John ask me about the problem?
-________，he tried to find a better way to settle it.
[ ]
A．Not to be satisfied
B．Not satisfied
C．Not being satisfied
D．Don't satisfy
答案
答案：B
搜题请搜索小程序“爱下问搜题”
，该分子中有________个σ键，________个π键，有________种极性键，________（填“有”或“没有”）非极性键。