题目内容

执行完以下语句，a 的值是（）。function suma( i ){var sums = 0 ;for(var n = 0 ; n <= i ; n++){ sums += n ;}return suma;}var a = sum(6);

A. 6
B. 15
C. 21
D. 20

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A. 187
B. 159
C. 34
D. 79

A. Thisisadog.
B. This is a dog .
C. This is a dog.
D. This is a.

A. Math.floor(Math.random()*10);
B. Math.round(Math.random()*10);
C. Math.ceil(Math.random()*10);
D. Math.static(Math.random()*10);

A. /^\w{6,12}$/
B. /^\D\w{6,12}$/
C. /^\D\w{5,11}$/
D. /^\d\w{6,12}$/