圆柱销多用作紧固连接，靠过盈来达到紧固连接的，经拆卸失去过盈可以继续使用
参考答案：错
When a pencil is partly in a glass of water, it looks as if it _____.[ ]
A. breaks
B. has broken
C. were broken
D. had been broken
在选择会址时，检查膳食供应通常使用的方法是（）。
A.看菜单
B.打电话询问
C.派人去品尝
D.根据以往的经验
