______ matters is to have a conversation with guests.
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A simple rule to remember is ______ liquids are to the right and solids are to the left.
A. which
B. that
C. what
If Nelson holds a dinner to treat David, then we can say Nelson is the ____?
A. host
B. guest
C. waiter
题号：38360设有： double x,y;则以下正确的输入语句是：
A. scanf("%lf,%lf",&x,&y);
B. scanf("%lf,%lf", x, y);
C. scanf("%d,%d",&x,&y);
D. scanf("%f,%f",&x,&y);
题号：38346C语言程序从（ ）开始执行。
A. 程序中的第一条语句
B. 程序中的最后一个函数
C. 程序中的第一个函数
D. 程序中的main函数
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