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【单选题】
苯乙烯是一种重要的有机化工原料,其结构下图,它一般不可能具有的性质是
A.
易溶于水,不易溶于有机溶剂
B.
在空气中燃烧产生黑烟
C.
它能使溴的四氯化碳溶液褪色,也能使酸性高锰酸钾溶液褪色
D.
能发生加成反应,在一定条件下可与4倍物质的量的氢气加成
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【单选题】圆球在三个基本投影面上的投影结果为()
A.
一个圆两个正方形
B.
两个圆一个正文形
C.
三个大小不相等的圆
D.
三个大小相等的圆
【单选题】圆球在三个基本投影面上的投影结果为
A.
一个圆两个正方形
B.
两个圆一个正方形
C.
三个大小不相等的圆
D.
三个大小相等的圆
【单选题】设已有定义:float x;则以下对指针变量P进行定义且赋初值的语句中正确的是( )。
A.
float*p=1024;
B.
int*p=(float)x;
C.
float p=&x;
D.
float*p=&x;
【单选题】圆球在三个基本投影面上的投影结果为 ( )
A.
一个圆两个正方形
B.
两个圆一个正方形
C.
三个大小相等的圆
D.
三个大小不相等的圆
【单选题】What happened to British industrialist James Louis?
A.
He was kidnapped eight months ago.
B.
He failed in his negotiations with the Africans.
C.
He was assassinated in Central Africa.
D.
He lost lots of money in his African business.
【单选题】Dave lost his job and was short of money, so ______his flat and move in with his brother.A.that h
A.
7. Dave lost his job and was short of money, so ______his flat and move in with his brother. A.that he did was to sell
B.
what he did sell
C.
what he did was sell
D.
what he did sold.
【单选题】技术的进步造成部分人素质不适应工作的要求,由此产生的失业是
A.
自愿失业
B.
结构性失业
C.
需求不足的失业
D.
周期性失业
【单选题】设已有定义:float x;,则以下对指针变量p进行定义且赋初值的语句中正确的是
A.
float *p=1024;
B.
int *p=(float)x;
C.
float p=&x;
D.
float *p=&x;
【单选题】设已有定义 float x; ,则以下对指针变量 p 进行定义且赋初值的语句中正确的是 ( ) 。
A.
float *p=1024;
B.
int *p=(int)x;
C.
float p=&x;
D.
float *p=&x;
【简答题】Why did Andre Heidrich cut back online gaming? A.He had lost a lot of money. B.His family had intervened. C.He had offended his relatives. D.His career had been ruined.
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