以下哪些因素可能导致铸件出现冷热裂纹 ()
A.铸型冷却方式不合理
B.熔金温度过高
C.铸造压力过大
D.铸型强度过大
E.铸件厚薄不一
参考答案:A, D, E
As we all know, it was ____ that resulted in the terrible car accident.
A. because of her carelessness B because she was careless
C. her being careless D she was so careless
CRH1型动车组主变流器箱内主要装有()。
A.网侧变流器模块LCM
B.牵引变流器模块XCM
C.电机变流器模块MCM
D.辅助变流器模块ACM