Lizzie was ____ to see her friend off at the airport. [ ]

A. a little more than sad

B. more than a little sad

C. sad more than a little

D. a little more sad than

搅拌机搅拌过程不宣停车，如因故必须停车，再次启动前应（）。

A、进行检查

B、空载试验

C、卸除荷载

D、料斗提升试验