散文集《雅舍小品》的作者是()
A.何其芳
B.周作人
C.梁实秋
D.郁达夫
参考答案:C
I have much work to do. I'm busy.
A.a bit of
B.a little
C.a lot
D.a few
下列物质中,含有非极性键的共价化合物是( )
A.CH3CH3
B.Na2O2
C.NaCl
D.N2