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【简答题】
某种锂电池的总反应可表示为Li+MnO 2 =LiMnO 2 ．以下说法不正确的是（ ） A．该反应属于化合反应 B．反应中Mn的化合价发生了变化 C．LiMnO 2 为新型的氧化物 D．参加反应的Li与MnO 2 的质量比为7：87
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反馈参考答案：
举一反三
【判断题】The controllable elements can be altered in the long run and, usually, in the short run to adjust to changing market conditions, consumer tastes, or corporate objectives.
A.
正确
B.
错误
【简答题】概算定额的编制依据有（ ）。
【单选题】The long run is distinguished from the short run because only in the long run
A.
output prices can vary.
B.
factor of production prices can vary.
C.
the quantities of all factors of production can be varied.
D.
the firm no longer maximizes its profit.
【单选题】In which case can we be sure real GDP rises in the short run?
A.
foreign economies expand and taxes rise
B.
foreign economies expand and taxes fall
C.
foreign economies contract and taxes fall
D.
None of the above are correct.
【判断题】The short-run industry supply curve can be found by horizontally summing the short-run supply curves of all the individual firms in the industry.
A.
正确
B.
错误
【简答题】下列不属于概算定额的编制依据的是（ ）。
【简答题】概算定额的编制依据有（ ）。
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