【单选题】【消耗次数：1】
普萘洛尔治疗心绞痛的主要原因是
①
降低左心室压力
②
阻断心脏β1受体
③
降低回心血量
④
降低心脏前负荷
参考答案：
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相关题目
【单选题】
普萘洛尔治疗心绞痛时，下面描述错误的是
①
阻断β受体，抑制心脏，降低心肌耗氧量
②
增大心室容积，延长射血时间，能相对增加心肌耗氧量
③
促进氧合血红蛋白的解离，增加组织供氧
④
抑制心肌收缩力，减小心室容积，缩短射血时间，降低心肌耗氧量
随机题目
【单选题】
Well done. Congratulations on your success.
①
Thank you very much
②
Oh, no, no
③
No, I didn’t do very well
④
Sorry, I couldn’t any better
【单选题】
Good morning, sir. May I help you?
①
No, I don’t buy anything
②
No, I don’t need your help
③
Yes, I need some sugar
④
Oh, no. That’s OK
【单选题】
I’d like to take you to the coffee house on the corner.
①
Thank you. You shouldn’t’ do that
②
Thanks, I’d like to go with you
③
No, you can’t say so
④
No, no, You can’t do that
【单选题】
He’s determined to finish the job __________ long it takes.
①
no matter
②
however
③
wherever
④
whatever
【单选题】
-- Could I speak to John Harris, please.
①
Oh, how are you
②
I’m John
③
I’m listening
④
Speaking
【单选题】
Why don’t you travel to New York on vacation?
①
I don’t want to go
②
Excuse me, because I can’t
③
I want to, but I haven’t got enough money
④
Because I’m going to school today
【单选题】
Could you help me with my homework, please?
①
No, no way
②
No, I couldn’t
③
No, I can’t
④
Sorry I can’t. I have to go to a meeting right now
【单选题】
Determined to __________ as if everything were normal, he responded with a kind of indifference.
①
carry on
②
account for
③
bring up
④
get through
【单选题】
Mary, your dress is really beautiful. How is John?
①
Thank you very much
②
No, no, John is not bad
③
Thank you. He is fine
④
Don’t say that. It’s ugly. John is good
【单选题】
Excuse me, sir. Where is Dr. Brown’s office?
①
You can’t ask me
②
Pardon? I have no idea
③
Please don’t say so
④
Sorry I don’t know, but you can ask the man over there