设a和b均为double型变量，且a=5.5,b=2.5,则表达式（int）a+b/b的值为
A. 6.500000
B. 6
C. 5.500000
D. 6.000000
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以下程序运行后输出的结果是int k=2,i=2,m;m=(k+=i*=k);printf("%d,%d\n",m,i);
A. 8,6
B. 8,3
C. 6,4
D. 7,4
已知a=50;ch1='A';ch2='a';表达式a+=++ch2-ch1的值
A. 93
B. 83
C. 84
D. 97
When I agreed to go skydiving, I had no idea what I had let myself （）. Now I’m terrified!
A. in for
B. on for
C. of for
D. for in
The difficulties I found were not just rooted ( ) language, though.
A. at
B. on
C. of
D. in
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