吹扫冷换设备时另一程要（），以免（）。
参考答案：放空；憋压
除特殊吊装外，不得使用横销无螺纹的卸扣。
You have put on five kilograms recently. You'd better _____ too much. [ ]
A. not eat
B. not to eat
C. not eating
D. don't eat
