待生套筒穿孔,一般发生位置是在()。
A、待生立管上部
B、待生立管中部
C、待生立管下部
D、汽提段锥体处
参考答案:D
用所给词的正确形式填空。
1. May I have some milk? (much)
2. He is my friend. (good)
3. How does he know his friends? (good)
4. He enjoys toys with other children. (share)
5. Are you going to join a competition? (write)
6. The boy looks . (fun)
7. John is a young man. (help)
8. We should be to each other. (friend)
9. The present made me . (happily)
10. His voice sounds . (music)
我国著名商品农业基地与其优势农产品的对应,正确的是( )
A.江汉平原--水稻、棉花、油菜
B.太湖平原--水稻、棉花、甜菜
C.成都平原--水稻、油菜、甜菜
D.松嫩平原--甘蔗、亚麻、水稻