起升高度是指门架垂直，货叉起升到最高时，货叉上表面的（）距地面的垂直距离、。
A、货叉尖
B、货叉根部
C、载荷中心距
D、随意
参考答案：C
— Would you mind my closing the door?
— . [ ]
A. Yes, please
B. Of course not
C. Yes, help yourself
D. Sorry, I don't
Do your friends often ______the big cake _____you? [ ]
A. to share, to
B. share, with
C. share, for
D. to share, with
