31
[答案]:ABC
[解析]:参见教材P66
32
[答案]:AB
[解析]:参见教材P70
33
[答案]:ABD
[解析]:参见教材P69
34
[答案]:ABCD
[解析]:参见教材P69
35
[答案]:BD
[解析]:参见教材P69
36
[答案]:AC
[解析]:参见教材P69
37
[答案]:ABCD
[解析]:参见教材P65
38
[答案]:ABCD
[解析]:参见教材P62、63
39
[答案]:AB
[解析]:参见教材P62
40
[答案]:CD
[解析]:参见教材P63
41
[答案]:AC
[解析]:参见教材P63
42
[答案]:AC
[解析]:参见教材P62
43
[答案]:AD
[解析]:参见教材P62
44
[答案]:ABC
[解析]:参见教材P61—62
45
[答案]:ABC
[解析]:参见教材P61—62
46
[答案]:ABCD
[解析]:参见教材P61
47
[答案]:AD
[解析]:参见教材P61
48
[答案]:ACD
[解析]:参见教材P61
49
[答案]:CD
[解析]:参见教材P61
50
[答案]:AD
[解析]:参见教材P60—61
51
[答案]:AB
[解析]:参见教材P60
52
[答案]:AD
[解析]:参见教材P81
53
[答案]:AB
[解析]:参见教材P80
54
[答案]:AC
[解析]:参见教材P80
55
[答案]:ABCD
[解析]:参见教材P77—78
56
[答案]:ABCD
[解析]:参见教材P76
57
[答案]:ABC
[解析]:参见教材P75
58
[答案]:ABCD
[解析]:参见教材P76
59
[答案]:ABCD
[解析]:参见教材P75
60
[答案]:AB
[解析]:参见教材P74
61
[答案]:ABCD
[解析]:参见教材P72—73
62
[答案]:AB
[解析]:参见教材P72
63
[答案]:ABC
[解析]:参见教材P71
64
[答案]:BC
[解析]:参见教材P72
65
[答案]:ABC
[解析]:参见教材P72
66
[答案]:ABCD
[解析]:参见教材P71
67
[答案]:ABCD
[解析]:参见教材P71