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【简答题】
Great as Newton was, many of his ideas ____________ today and are being modified by the work of scientists of our time. A) are to challenge B) may be challenged C) have been challenged D) are challenging
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【简答题】We assume that A is large, which it must be for a well-designed circuit(电路).
【多选题】for single large plane wall, we commonly assume the heat conduction meets the following conditions .
A.
Steady state
B.
One-dimention
C.
Constant thermal conductivity
D.
No heat generation
【多选题】For single large plane wall, we commonly assume the heat conduction meets the following conditions .
A.
Steady state
B.
One-dimention
C.
Constant thermal conductivity
D.
No heat generation
【简答题】欲将100 mL 0．10 mol·L-1 HCl溶液的pH值从1．00增加至4．44时，需加入固体醋酸钠(NaAc)多少克(不考虑加入NaAc后溶液体积的变化)? [Mr(NaAc)=82．0，pKHAe=4．74]
【多选题】For multi-layer large plane wall, we commonly assume the heat conduction meets the following conditions .
A.
Constant thermal conductivity.
B.
No heat generation.
C.
One-dimention and steady-state
D.
Perfect interface contact
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