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【单选题】
下列关于点电荷的说法,错误的是( )A.
点电荷是一个带有电荷的几何点,它是实际带电体的抽象,是一种理想化的模型
B.
带电体如果本身大小和形状对它们间的相互作用影响可忽略,则可视为点电荷
C.
真空中两个静止点电荷间的相互作用力,跟它们之间的距离成反比
D.
真空中两个静止点电荷间的相互作用力,跟它们所带的电荷量的乘积成正比
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【单选题】What lesson has Reebok learned from Nike' s distribution problems?
A.
A company should not sell its high quality shoes in discount stores.
B.
A company should not limit its distribution network.
C.
A company should do follow-up surveys of its products.
D.
A company should correctly evaluate the impact of a new craze on the market.
【单选题】The findings from the company's market research were not ______ enough to justify a change in strategy.
A.
clear
B.
clearly
C.
clearing
D.
clarity
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