青藏高原东南暖湿、西北冷干的主要原因是:①地势西北高、东南低 ②纬度位置的差异;③经度位置的差异 ④东南为季风区,西北为非季风区。
Because of the financial crisis,I have no ready____ on me. Can I pay you tomorrow?
She packed______ her job, and went off to Qingdao for the Navy celebration.
You waste much time______pig flu.on the internet..
---- Is there a vaccine _____ pig influenza?, I’m anxious to know. ----- Don’t worry, there is a vaccine _____ for pigs against pig influenza
Has she had a cold like pig flu. _____? for she is absent.