高锰钢整铸辙叉叉趾、叉跟轨头及下颏部位裂纹（）时为重伤标准。
A、超过15mm
B、超过30mm
C、20mm
D、25mm
参考答案：B
—Where did you meet him?
—It was in the hotel _____ he stayed.[ ]
A. that
B. which
C. where
D. when
737NG扰流板的如何数（）
A.从左到右0到9
B.从左到右1到10
C.从左到右0到11
D.从左到右1到12
