机器造型的中小型砂箱常采用（）锁紧。
A.楔形卡
B.楔锁
C.螺栓
D.焊接
参考答案：A
有以下程序fun(int x){ int p；if(x= =0 || X= =1)return(3)；P=x-fun(x-2)； return P；main(){ printf("％d＼n",fun(7))；}执行后的输出结果是【 】。
A．7
B．3
C．2
D．0
Which of the following is true
A．I took the medicine away.
B．The medicine is tasty.
C．I like the medicine anyway.
D．I ate the medicine.
