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【单选题】
当儿童在生理和活动能力方面得到迅速发展的时候,由于心理发展跟不上这种变化,导致其内心发生冲突,进而引发混乱。处在这个时期的儿童在行为方式、理解能力等方面都会发生非常大的变化,这个时期是( )。A.
B.
转折期
C.
敏感期
D.
最近发展区
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反馈参考答案：
举一反三
【简答题】简述三种原子光谱(发射、吸收与荧光)分析法的本质区别。
【单选题】Why do people feel squeezed when their average income rises considerably?
A.
Their material pursuits have gone far ahead of their earnings.
B.
Their purchasing power has dropped markedly with inflation.
C.
The distribution of wealth is uneven between the rich and the poor.
D.
Health care and educational costs have somehow gone out of control.
【简答题】Why do people feel squeezed when their average income rises considerably? A) Their material pursuits have gone far ahead of their earnings. B) Their purchasing power has dropped markedly with inflatio...
【简答题】酶含量测定包括酶 和酶质量测定两种类型，但以前者为主。
【单选题】某企业生产产品经过两道工序，各工序的工时定额分别为60小时和20小时，则第二道工序在产品的完工率为（ ）。
A.
37.5%
B.
50%
C.
87.5%
D.
100%
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