28.The technique of spectroscopy allows analyst of incoming light after it has been separated into its component wavelengths by passage through a prism.
Choice is A
But for D, 是不是改成 by passing 呢
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我也晕了
The correct choice is A.
Because 'analysts' should be used or 'the analyst' should be used.
In the other words, 'passage' is a noun.The use is correct.
同意楼上的,analyst应为analysis
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