# 题目内容

It can be inferred from the sentence highlighted in the passage that a standard candle is useful to scientists for which of the following reasons?
• AStandard candles do not have their own locus of motion.
• BStandard candles more reliably adhere to the law of inverse squares than do other supernovas.
• COnly standard candles provide a known measure of brightness.
• DKnowledge of an objects brightness of an object allows scientists to measure the speed at which the object is moving toward Earth.
• EKnowledge of an objects brightness allows scientists to accurately measure its distance from Earth.

E显示答案

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