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【单选题】
普萘洛尔阻断突触前膜β受体可引起()A.
去甲肾上腺素的释放增加
B.
去甲肾上腺素的释放减少
C.
外血管收缩
D.
去甲肾上腺素的释放无变化
E.
心收缩力增加
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举一反三
【简答题】常用的测定CMC方法有( )A. 表面张力法; B. 电导法; C. 染料法; D. 光散射法;
【单选题】The author suggests that Aristotle believed which of the following was true of the dramatic art that existed prior to Aeschylus?
A.
It was unusually resourceful in finding ways to extend the unity of time beyond a single day.
B.
It was less elegant than later drama because its disregard for unity of place necessitates the movement of the chorus.
C.
It tended to demonstrate better unity of time than of character and action.
D.
It did not employ a beginning middle or end, and this fell outside the acceptable range of dramatic principles.
E.
It tended to overemphasize the use of cause and effect, instead of the continuity of time, in organizing its action.
【单选题】关于翡翠和独山玉的区别，以下哪种说法是不对的?()
A.
与翡翠一样，独山玉的颜色十分丰富。
B.
独山玉的结构为细粒结构，肉眼看不见结晶颗粒。这一点可以与具粒状结构的翡翠和其它玉石品种区分开来。
C.
优质独山玉与优质翡翠的外观非常相似，如果不借助鉴定仪器，肉眼是很难区分开的。
D.
优质独山玉的颜色与翡翠相似，但通过潭尔斯滤色镜就可以区别它们。
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【单选题】_________ hold their distance, rarely establish eye contact, and gesture less dramatically; however, _________stand in close proximity to each other, maintain eye contact, and gesture more frequently.
A.
Women, girls
B.
Men, boys
C.
Men, women
D.
Women, men
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