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【多选题】
抽样调查的主要突出优点是()。A.
具有统一性
B.
按随机原则抽选样本
C.
具有全面性
D.
总体中每一个单位都有一定的概率被抽中
E.
可以用一定的概率来保证将误差控制在规定的范围内
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反馈参考答案：
举一反三
【单选题】0621 0051 :下列一维数组正确初始化是 ( ) 。
A.
int a[5] ={1,2};
B.
int a[2]={12,3,4,5};
C.
int a[5]={,,1,2};
D.
int *a={12,3,4,5};
【简答题】The first time I decided to leave home was when 1 was in high schoo1．1 was having trouble getting along will my parents．I had about a hundred dollars in my pocket，and so I thought about leaving home, ...
【简答题】Maggiano is an award-winning teacher in the Social Studies Department at West Springfield High School in Virginia．He has taught in public and private schools for 25 years．In a piece on his blog called...
【简答题】n. [C] a holiday on a large ship 乘船度假
【简答题】c___ n. a large, destructive fire
【简答题】Maggiano is an award-w inning teacher in the Social Studies Department at West Springfield High School in Virginia. He has taught in public and private schools for 25 years .In a piece on his blog cal...
【单选题】The author really started on his way to become a writer ______.
A.
when he was in high school
B.
when he was studying at Harvard
C.
when he lived in London
D.
after he entered college
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