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阅读下列材料,回答问题: 是4岁幼儿,喜欢自言自语。看到梳子,她就拿过来给娃娃梳头,边梳:“梳个什么头呢...梳个小辫子......不对,应该这样......不好,梳两个小辫子......”给梳好 小子后,她兴奋地对它说:“娃娃要乖乖地去幼儿园,听老师话!” 问题:请根据儿童言语功能发展的有关原理,对上述案例加以分析。
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【简答题】HW #1 1.1 Summarize the evidence that led to the introduction of quantum mechanics. 【 】 1.2 Calculate the size of the quantum involved in the excitation of (a) an electronic oscillation of period 1.0 ...
【简答题】The so-called Lyman series of lines in the emission spectrum of hydrogen corresponds to transitions from various excited states to the n = 1 orbit. Calculate the wavelength of the lowest-energy line i...
【单选题】The pH inside endosomes is about 5.0, and the pH in the cytosol is about 7.0. Calculate the amount of free energy needed to maintain this acidity difference at 37°C. Ignore the effects of the transmem...
A.
10.9 kJ/mol
B.
11.9 kJ/mol
C.
12.9 kJ/mol
D.
13.9 kJ/mol
【单选题】Which process could be used to calculate the bond energy for the covalent bond X-Y by dividing its ∆H by n?
A.
XYn(g) → X(g) + nY(g)
B.
2XYn (g) → 2XYn-1(g) + Y2(g)
C.
Y(g) + XYn-1(g) → XYn(g)
D.
nXY(g) → nX(g) + 2n Y2(g)
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