冲裁间隙过大凸模刃口处的裂纹（）扩展。
A、在间隙内
B、向间隙外
C、向内
D、向外
参考答案：A
According to media reports, the London stadium is other Olympic stadiums in terms of steel used.
A．as 75% light as
B．75% lighter as
C．75% lighter than
D．as light as 75%
弛张热见于（）
A.败血症
B.布氏杆菌病
C.风湿热
D.回归热
E.重症肺结核
