The fuel pipes and ducts should be blown with ()
A. atmosphere
B. the fresh water
C. compressed air
Directions:
You want to invite some friends to a party. Writean invitation letter to them individually:
1.邀请参加晚会,
2.说明举办晚会的原因,
3.将安排哪些活动。
腹股沟内容物中不可能出现的是()
A. 左肾
B. 膀胱
C. 子宫
D. 大肠
E. 小肠
仔猪黄痢多发于()
A. 1~3日龄
B. 7~10日龄
C. 11~15日龄
D. 16~25日龄
E. 6~12月