二、多项选择题
1
[答案] ABDE
[解析] 参见教材P142
2
[答案] ACE
[解析] 参见教材P144
3
[答案] BCDE
[解析] 参见教材P144
4
[答案] BD
[解析] 参见教材P145
5
[答案] CDE
[解析] 参见教材P145
6
[答案] ABCD
[解析] 参见教材P146
7
[答案] ACE
[解析] 参见教材P148
8
[答案] CDE
[解析] 参见教材P148
9
[答案] ABCD
[解析] 参见教材P149