“假期综合症”的发生有哪几个原因()
A、长假扰乱了平常的活动规律
B、长假产生惰性,产生精神疲惫
C、长假可以出去旅游
D、饮食不规律,导致危害
参考答案:A, B, D
---May! How is your plan? I heard you started it last Sunday.
---Oh! I for it, but I haven’t decided where to start it.
A.have prepared
B.had prepared
C.have been preparing
D.was preparing
酵母菌细胞结构与细菌细胞结构主要有哪些不同?