以下为编年体史书的是()。
A.《史记》
B.《春秋》
C.《左传》
D.《资治通鉴》
参考答案:B, C, D
The little girl looked at the host with a ____ expression . Maybe the question was quite_____.
A puzzled ; puzzled B puzzling ; puzzled C puzzled ; puzzling D puzzling ; puzzling
带有电荷的原子(或原子团)叫做离子,带负电荷的离子叫做阳离子,带正电荷的离子叫做阴离子。()