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搜题
【单选题】
植物体没有根茎叶的分化,营自养生活的植物是
A.
菌类
B.
地衣
C.
藻类
D.
蕨类
E.
裸子
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【单选题】下面化合物在芳环上的氯原子上发生亲核取代反应速率的活性顺序为 图片7.png
A.
Ⅰ > Ⅱ > Ⅲ > Ⅳ
B.
Ⅳ > Ⅲ > Ⅱ > Ⅰ
C.
Ⅰ > Ⅱ > Ⅳ > Ⅲ
D.
Ⅲ > Ⅳ > Ⅱ > Ⅰ
【单选题】以下关于二维数组a的说明中正确是( )。
A.
int a[3][ ];
B.
float a(3,4);
C.
char a(3)(4);
D.
double a[3][4];
【单选题】下面化合物在芳环上亲核取代反应速率顺序为 图片7.png
A.
Ⅰ > Ⅱ > Ⅲ > Ⅳ
B.
Ⅳ > Ⅲ > Ⅱ > Ⅰ
C.
Ⅰ > Ⅱ > Ⅳ > Ⅲ
D.
Ⅲ > Ⅳ > Ⅱ > Ⅰ
【单选题】下面化合物在芳环上的氯原子上发生亲核取代反应速率的活性顺序为
A.
Ⅰ > Ⅱ > Ⅲ > Ⅳ
B.
Ⅳ > Ⅲ > Ⅱ > Ⅰ
C.
Ⅰ > Ⅱ > Ⅳ > Ⅲ
D.
Ⅲ > Ⅳ > Ⅱ > Ⅰ
【单选题】以下关于二维数组a的说明中正确是
A.
int a[2][ ]
B.
char a(2,3)
C.
float a(2)(3)
D.
double a[2][3];
【单选题】下面化合物在芳环上亲核取代反应速率顺序为
A.
Ⅰ > Ⅱ > Ⅲ > Ⅳ
B.
Ⅳ > Ⅲ > Ⅱ > Ⅰ
C.
Ⅰ > Ⅱ > Ⅳ > Ⅲ
D.
Ⅲ > Ⅳ > Ⅱ > Ⅰ
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【简答题】1. Complete the sentences with words or expressions from the boxes. turned to, pointed, at the end of, looked up, recognize, took his place 1. I _____________ my friend and asked her if she could le...
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