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【简答题】
氨基酸是两性电解质,当pH等于pI时,氨基酸所带净电荷为 ,此时溶解度_____。
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举一反三
【单选题】The word 'girl' originally meant 'young person of either sex', but now it means 'young people of female sex'. This is an example of
A.
meaning shift.
B.
widening of meaning.
C.
narrowing of meaning.
D.
loss of meaning.
【单选题】__________ these young giant pandas grow up, they are __________ the necessary skills to live in the wild __________. [ ]
A.
When, teach, on their own
B.
When, taught, on themselves
C.
As, taught, on their own
【单选题】个体的自我感受、自尊、自爱、自卑、自信、内疚、自豪感 责任感、优越感、成就感、自我效能感等,属于自我意识中的(
A.
自我认识
B.
自我体验
C.
自我控制
D.
自我概念
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