单项选择题

Plants will emit an increased amount of heat when they are ()

A. sprayed with pesticides
B. in pour physical condition
C. facing an infrared scanner
D. exposed to excessive sun rays

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单项选择题
The expression make the most of in Line 4 is closest in meaning to which of the following()

A. Get the best yield from.
B. Raise the price of.
C. Exaggerate the worth of.
D. Earn a living on.
单项选择题
The harm radiation has done to the Apollo crew members ()

A. is insignificant
B. is enormous
C. seems overestimated
D. remains unknown
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