OG-7求助

smilemm · 发表于 2009-5-9 14:09:00

7. The ice on the front windshield of the car had formed when moisture condensed during the

night. The ice melted quickly after the car was warmed up the next morning because the

defrosting vent, which blows on the front windshield, was turned on full force.

Which of the following, if true, most seriously jeopardizes the validity of the explanation for the

speed with which the ice melted?

A. The side windows had no ice condensation on them

B. Even though no attempt was made to defrost the back window, the ice there melted at the

same rate as did the ice on the front windshield.

C. The speed at which ice on a window melts increases as the temperature of the air blown

on the window increases

D. The warm air from the defrosting vent for the front windshield cools rapidly as it dissipates

throughout the rest of the car.

E. The defrosting vent operates efficiently even when the heater, which blows warm air

toward the feet or faces of the driver and passengers, is on.

C为什么不对啊可以看成是他因削弱啊

[此贴子已经被作者于2009-5-9 14:10:18编辑过]

fingereleven · 发表于 2009-5-9 18:00:00

额？如果你选C不是加强了么？如果冰融化的速度和解冻器释放的热空气的温度成正比的话？

kissmorekiss · 发表于 2009-5-9 18:04:00

c是加强了。

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