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【单选题】
经过他人收集、记录、整理所积累的各种数据和资料是()A.
一手资料
B.
二手资料
C.
原始资料
D.
统计资料
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【简答题】People on Hainan Island like scuba diving. But do you know what makes it possible for people 1 under water for a long time? It’s the scuba machine. Then do you know 2 invented the machine? It was Jacq...
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【单选题】若指针p已正确定义，要使P指向两个连续的整型动态存储单元，不正确的语句是( )。
A.
p=2*(int*)malloc(sizeof(int));
B.
p=(int*)malloc(2*sizeof(int));
C.
p=(int*)malloc(2*2);
D.
p=(int*)calloc(2,sizeof(int));
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