
强心苷治疗心力衰竭的药理学基础是().
A.抑制房室传导
B.加强心肌收缩力
C.抑制窦房结
D.缩短心房的有效不应期
E.加快房室传导


A.抑制房室传导
B.加强心肌收缩力
C.抑制窦房结
D.缩短心房的有效不应期
E.加快房室传导
从每小题所给的A、B、C三个选项中,选出可以填入空白处的正确答案。
( )1. —Hi,Jane. What time do you get up _____ weekdays?
—I usually get up _____ about six o’clock.
A. in;at B. on;at C. at;at
( )2. —_____ do you go to the supermarket with your mother?
—Five times a week.
A. How long B. How often C. How many
( )3.—_____ do you _____ the girl?
—She is very kind to everyone.
A. What;think of B. What;like
C. What;think about
( )4. I don’t like physics ______ it’s too difficult for me.
A. and B. so C. because
( )5. Mr. Zhang sometimes the subway to work.
A. takes B. to take C. taking
( )6. There are books and water in the classroom.
A. a few;a few B. a few;a little C. a little;a few
( )7. Sam goes to the library by bike. He always walks there.
A. never B. often C. sometimes
( )8. —Why do you like playing soccer?—Because it’s .
A. difficult B. boring C. interesting
( )9. They are talking about the map of China in the class. They are having a class.
A. physics B. geography C. math
( )10. —How long can I your CD player?
— For two weeks.
A. keep B. borrow C. get
( )11. It’s time for lunch. Would you like to go to the restaurant with me?
A. having B. have C. has
( )12. —Are you doing your homework at home,Tim?
— . I’m playing computer games now.
A. Yes,I am B. No,I’m not C. No,we aren’t.
( )13. She is looking for her book. It must be .
A. her B. she C. hers
( )14. — is your brother,Jenny?
—He is swimming in the pool.
A. When B. What C. Where
( )15. —Lily,your new dress looks very nice!—
A. I think soB. Thank youC. That’s all right .