阅读理解。

1. Who is helping protect the environment?

A. Mrs. Gao            

B. Mr. Xu          

C. Miss Gao        

D. Mr.Lu

2.  When can people go to visit the old people in the old people’s home?

A. On Monday.        

B. On Wednesday.    

C. On Friday.      

D. On Saturday.

3. What does the second piece of news call on people to do?

A. To stay with the poor.  

B. To visit old people.

C. To help the poor.

D. To collect rubbish.

去甲肾上腺素对心血管的作用主要是（）。

A.舒张血管

B.升高血压

C.心率加快

D.强心

E.增大脉压