W: You look like you are freezing to death. Why don’t you put this on
M: Thank you, it was so warm at noon, I didn’t expect the weather to change so quickly.
Question: What do we learn from the conversation

A. The woman didn’t expect it to be so warm at noon.
B. The woman is sensitive to weather changes.
C. The weather forecast was unreliable.
D. The weather turned cold all of a sudden.

第三代头孢菌素具有以下特点（）

A.对肾的毒性最低

B.对G⁺菌的抵抗能力最强

C.对G^-菌的抵抗能力最强

D.对β-内酰胺酶最不稳定

E.透入血-脑屏障能力最强