![](https://lstatic.shangxueba.com/jiandati/pc/images/pc_jdt_tittleico.png)
以下表达式的结果是: '1'+3
![](https://lstatic.shangxueba.com/jiandati/pc/images/jdt_panel_vip.png)
A、(a+b)*h/2
B、(1/2)*(a+b)*h
C、(a+b)*h*1/2
D、h/2*(a+b)
A、(a+b)*h/2
B、(1/2)*(a+b)*h
C、(a+b)*h*1/2
D、h/2*(a+b)
A.(a+b)*c/2
B.(1/2)*(a+b)*c
C.(a+b)*c*1/2
D.c/2*(a+b)
A. (a+B.*c/2
B. (1/2)*(a+B.*c
C. (a+B.*c*1/2
D. c/2*(a+B.
A、选 %f 语句描述为: printf( "%f",y);
B、选 %d 语句描述为: printf( "%.2d",y);
C、选 %f 语句描述为: printf( "% .2f",y);
D、选 %f 语句描述为: printf( "%6.1f",y);
A、ch >= 'A' && ch <='z'> B、ch <= 'z' && ch>= 'A'
C、'A' <= ch> D、ch >= 'A' || ch <= 'z'> E、ch >='A' AND ch <='z'> F、ch BETWEEN 'A' AND 'Z"
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