Whom would you rather have_______with you,him or me?
A.to be gone
B.gone
C.going
D.go
答案:D
简述盐化土壤和碱化土壤的区别
空气压缩机工作时,侧盖呼吸器排气多,其原因是()。
A、活塞环失效
B、气阀失效
C、润滑不良
D、转速太低