水稻中期烤田应坚持“苗到不等时，（）”的原则。
参考答案：时到不等苗
括号内单词的适当形式填空。
1. What____he_____(do) now?
2. Tom likes______(run)in the morning.
3. One of the __________(watch) is mine.
4. Old Henry _____(sit) on a bench and watched his dog in the park.
5. Oh,what a ____(sun) day!
视网膜裂孔边缘翻卷，表面皱褶，考虑病变为哪一级（）
A.增生性玻璃体视网膜病变A
B.增生性玻璃体视网膜病变B
C.增生性玻璃体视网膜病变C1
D.增生性玻璃体视网膜病变D
E.增生性玻璃体视网膜病变C1-3
