单项选择题

Women were attracted to Mrs. Pinkham because______.

A．of her photo
B．of her product
C．of her interest in them
D．of her son
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单项选择题
It can be inferred from the simplicity of the example of the bowling ball and rubber sheet to describe Einstein's theory that______.
A．this was how Einstein reached his conclusions
B．Einstein used this example to explain his theory to students
C．the theory is so complex that a more detailed example would not allow most people to quickly understand the general idea
D．any theory is just a way of trying to explain something for which there is no certainty, so a simple example is sufficient
单项选择题
According to the passage, which of the following phenomena did Einstein describe in his General Theory of Relativity, that was not explained by Newton's theory
A．A solution to the Michelson-Morley experiment.
B．The motions of distant planets.
C．How light could travel in a vacuum.
D．The nature of gravity.
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