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【单选题】
抽样方法大体可以分为两类，即( )A.
方便抽样和配额抽样
B.
概率抽样和非概率抽样
C.
判断抽样和雪球抽样
D.
随机抽样和分层抽样
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【单选题】_____ or not we had a baby, we couldn’t survive only on my salary.
A.
As
B.
Even
C.
However
D.
Whether
【单选题】下列语句段中不是死循环的是( )。
A.
int i=100 While (1) { i=i%100+1 if(i==20) break； }
B.
int i sum=O； for (i=l;;i++) sum=sum +l；
C.
int k=0； do { ++K }while(k<=O)；< /div>
D.
int s＝3379； while (s+ +%2+3%2)s++；
【单选题】We were too tired to go on with our work, ______ we had a break.
A.
accordingly
B.
conversely
C.
primarily
D.
frequently
【简答题】Listen and number. ( )We also took many pictures. ( )We had a lot of fun on our holiday. ( )We went by bus. ( ) We ate good food and learned some Chinese. ( )We went to Shanghai on...
【单选题】下列各循环语句中，不是死循环的是( )。
A.
int i=100； while(1){ i=i%100+1； if(i==20) break； }
B.
int i,sum=0； for(i=1；；i++) sum=sum+1；
C.
int k=0； do{ ++k； }while(k>=0)；
D.
int s=3379； while(s++%2+3%2) s++；
【简答题】阅读短文，选择正确答案。 On National Day, we had a long holiday. We had seven days. I went to Hainan with my parents. My grandparents lived in a beautiful village in Hainan. We visited them. We went to see the bl...
【单选题】现有以下语句: i=1; for (;i＜=100;i++) sum+=i;
A.
for(i-1;;i++) { sum+--i; if(i==100) break; }
B.
for(i=1;i＜=100;) { sum+=i; i++; }
C.
i=1; for(;i＜=100;) { sum+=-i; }
D.
i=1; for(;;) { sum+=i; if(i==100) break; i++; }
相关题目：
【单选题】下列语句段中不是死循环的是( )。
A.
int i=100 While (1) { i=i%100+1 if(i==20) break； }
B.
int i sum=O； for (i=l;;i++) sum=sum +l；
C.
int k=0； do { ++K }while(k<=O)；< /div>
D.
int s＝3379； while (s+ +%2+3%2)s++；