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【单选题】异丙肾上腺素化学性质不稳定,极易氧化,是由于结构中有()
A.
烯胺结构
B.
叔胺结构
C.
烯醇式羟基
D.
亚砜基
E.
邻二酚羟基
【单选题】It can be concluded that English Linguistic Imperialism is ______.
A.
the English elitism that English is becoming an accepted form. and superior to other languages
B.
the Great Britain' s invasion of other countries in the world
C.
the colonialism held by English speaking people
D.
referring to English linguists who are very hegemonic and offensive
【单选题】Fiedler concluded that task-oriented leaders performed best when the situation was ________.
A.
highly favorable
B.
highly unfavorable
C.
either highly favorable or highly unfavorable
D.
moderately favorable or moderately unfavorable
【单选题】Fiedler's LPC ratings concluded that leaders were either ________.
A.
positive or negative
B.
task oriented or trusting
C.
relationship oriented or people oriented
D.
task oriented or relationship oriented
【单选题】Fiedler concluded that relationship-oriented leaders performed best when the situation was ________.
A.
highly favorable
B.
highly unfavorable
C.
either highly favorable or highly unfavorable
D.
moderately favorable or moderately unfavorable
【单选题】异丙肾上腺素化学性质不稳定,极易氧化,是由于结构中有
A.
β-羟基
B.
叔胺结构
C.
乙胺侧链
D.
苯环
E.
邻二酚羟基
【判断题】Fiedler concluded that relationship-oriented leaders seemed to perform better in highly unfavorable situations.
A.
正确
B.
错误
【单选题】镶板门在一侧钉木板,面平框樘,现称为( )。
A.
夹板门
B.
拼板门
C.
镶板门
D.
镶玻璃门
【单选题】下列关于合金的说法错误的是
A.
镁铝合金的熔点比镁和铝都髙
B.
镁铝合金的硬度比镁和铝都大
C.
合金比纯金属用途更广泛
D.
青铜、硬铝、钢都是合金
【多选题】栀子苷的性质是:
A.
易溶于水
B.
苷键易为酸水解
C.
与氨基酸发生显色反应
D.
与铜离子显蓝色
E.
与Shear试剂显特殊颜色
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