仔猪梭菌性肠炎主要侵害仔猪,发生的年龄段主要集中在()
A.7~12周龄
B.7~10日龄
C.1~3日龄
D.5~10周龄
E.35~70日龄
参考答案:C
单词拼写。
1. Richey was glad to have a chance to ______ (采访) a few foreigners who attended "Join the Fun
in Jinling" yesterday.
2. We can enjoy f______ air in the countryside.
3. We feel quite ______ /ri'lkst / when having a music class.
4. The astronauts ______ (描述) what they had seen in space.
5. The abacus was invented in the sixth ______ /senturi/ by the Chinese.
6. He r______ to go to the party so I had to go there instead.
7. It was cold,but the trip was ______. (令人愉快)
8. We hope it will be sunny tomorrow, for our ______ /'piknik/.
土地利用计划是指根据(),对各类土地的数量的具体安排。
A.土地利用总体规划
B.经济社会发展需求
C.各类不同土地的肥力
D.各类不同土地的价格