树木根系在年周期生长中没有()休眠现象,只要条件不适合时,()休眠。
参考答案:生理自然;被迫
句子排序。
( ) Look at the blue T-shirt.
( ) Have you got a big one?
( ) I'II buy a T-shirt.
( ) Here it is.
( ) The blue one is small.
( ) That's nice. I'll take it.
急性呼吸衰竭的病因之一是()
A.慢性肺脓肿
B.广泛胸膜肥厚
C.大量胸腔积液
D.肺间质纤维化
E.严重肺结核