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【单选题】
下列那个叙述与吗啡及合成镇痛药共同结构特点不符?()
A.
分子中具有一个平坦的芳环结构
B.
具有一个碱性中心
C.
具有一个负离子中心
D.
含有哌啶环或类似哌啶环的空间结构
E.
烃基链部分(吗啡结构中C15~C16)突出于平面前方
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【单选题】(英语专业学生做) Individualism, independence, and self-reliance are perhaps the most distinctive American characteristics. American 'individualism' is【61】a good thing it does not mean being【62】, and each per...
A.
considered
B.
considering
C.
regarded
D.
considered as
【简答题】汽车动力性的评价指标主要有( )、( )和( )等三个。
【简答题】汽车动力性的评价指标主要有最高车速.加速性能和_____。
【简答题】汽车动力性的评价指标主要有( )、( )、( ) 。
【简答题】汽车动力性的评价指标主要有最高车速、加速时间和 三方面。
【单选题】对于一个没有戒烟愿望的人,要改变其吸烟行为。根据行为转变阶段埋论,下列哪项干预方法效果更好( )
A.
提供怎样戒烟的具体方法
B.
提高他对吸烟危害的认识,产生戒烟愿望
C.
进行经济限制
D.
进行意志力的培养
【简答题】Individualism, independence and __(1)__ are perhaps the most distinctive American characteristics. American ___(2)___ is considered a good thing and is regarded as a good quality. It does not mean bei...
【单选题】If you describe a person or their work as , you mean that they have been very successful in their career and have a good reputation. (U1-A )
A.
distinctive
B.
instinctive
C.
distinguished
D.
extinguished
【单选题】What does 'spin' in Para. 3 mean?
A.
A swift whirling motion.
B.
A state of mental confusion.
C.
The distinctive complex of connotations or implications.
D.
A distinctive character.
【简答题】汽车动力性的评价指标主要有 , 、 。
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