掘进中为保证顶板的稳定性，只有当煤层上部有假顶时把假顶挑去，这种方式叫（）。
参考答案：挑顶
---Where did you come across our Chinese teacher ?
--- It was in the supermarket ______I purchased mooncakes．
A．that
B．which
C．where
D．when
会计入员审核原始凭证时发现其金额有差错，应由( )。
A．出具单位重开B．经办人员更正C．会计入员更正D．审批人员更正
