不会造成饲料粉碎机工作中振动强烈故障的是()。
A.转子或动齿盘的转速过高
B.原料太湿
C.锤片排列不对,造成动不平衡
D.个别的锤片被卡住甩不开
参考答案:B
Don’t forget the day ____ you were received into the Youth League.
A.when
B.that
C.at which
D.where
胃肠道肿瘤血道转移最常见的脏器是
A.肝脏
B.肺脏
C.脑
D.骨