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【单选题】
去甲肾上腺素与肾上腺素的叙述,下列那项作用不同A.
正性肌力作用
B.
兴奋β受体
C.
兴奋α受体
D.
负性频率作用
E.
被MAO和COMT灭活
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举一反三
【单选题】The _______of our life has been improved greatly since the Party’s policy was carried out.
A.
attitude
B.
quality
C.
outline
D.
altitude
【单选题】听力原文：Of the students participating in our university's research project, 73% classified themselves as freshmen and sophomores. (23)
A.
Many university students prefer soft drinks to fresh fruits.
B.
Most of them are first-or-second year college students.
C.
A number of college students refuse to disclose their identities.
D.
Not many students are interested in our research projects.
【简答题】It seems like every day there's some new research about whether our favorite drinks are good for us. One day, science says a glass of red wine a day will help us live longer. The next day, maybe not...
【简答题】史铁生《我与地坛》是什么体裁的文章?本文中，作者通过哪些方法来表现母爱的?
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