下列除哪项外，均为风寒感冒与风热感冒的主要鉴别依据？（） A.恶寒发热的孰轻孰重 B

阅读理解。

     Mrs. White has a son. His name is Sam White. The young man works in a post office in a city. He asks

his mother to visit the city, and the old woman is happy and catches (赶上) a train. Soon she gets to the city,

but she doesn't know where the post office is. She begins to look for it. but she can't find it. At a bus stop she

asks all old mall, "Excuse me, sir, how can I get to the post office?"

     "We have about forty post offices in our city," says the old man."Which one do you want to go?"

     The old woman gives Sam's letter to him and the old man says,"Walk along this street and take the fourth

turning on the left. His post office is just there."

      Mrs. White thanks the old man and soon finds her son. They're very happy. A week later the woman goes

to the zoo. She sees all kinds of animals but after that she can't find the way to the post office again. At the

same bus stop she meets the same old man and she asks the same question again.

      "Oh dear!" the old man calls out."Are you still looking for your son?"

根据短文内容， 回答下列问题。

1. Where does Sam White work?

____________________________________________________________________________

2. How does Mrs. White go to the city?

____________________________________________________________________________

3. Does the old woman know how to get to her son's post office?

____________________________________________________________________________

4. How many post offices are there in this city?

____________________________________________________________________________

5. Does the old man know Mrs. White finds her son?

____________________________________________________________________________

教学系统的意义

核潜艇问世后的第1战是在何时何地进行的？

以下哪种免疫球蛋白在血清中含量最高（）

A.分泌性IgA

B.IgD

C.IgG

D.IgE

E.IgM

国际收支调节的收入分析法理论的基础来源是（）。

A.货币学派

B.凯恩斯学派

C.新自由主义学派

D.供给学派