M5斜盘在（）处的间距为一个双倍长烟条段的距离。
A.最窄处
B.最宽处
C.中间
D.入口处
参考答案：A
He’s ______ China twice. He’s visited many interesting places there.
A．been to
B．gone to
C．going to
D．going to go to
