大全4-3

[amyliang]

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 only 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.
ans:B
要weaken
題目是說(簡單解釋) 晚上車窗會結霜 早上發車時defrosting vent 會把霜融化
...
我選D 不知道為什麼答案是 ｂ
我覺得B根本不能weaken啊....

[sleeplessboy[origen]]

哇這題還蠻難解釋的 我來試試看

B 沒有試著去解凍後面的窗戶, 它解凍的速度跟前面的還是一樣快 既然沒有用外力去解凍. 她的速度就跟前面一樣, 這樣就有weaken到速度

這題比較關鍵點應該是外力跟速度的關係,

題目: 有外力 -> 所以前窗戶解凍的很快

B: 後窗戶無外力 -> 解凍的速度跟前面的一樣快

所以: 這樣有用外力去解凍前窗戶跟無外力一樣, 那題目說用外力去解凍速度很快就無法成立

[amyliang]

..嗯...嗯...那為什麼不可以選D呢...

[sleeplessboy[origen]]

應是要解釋的話應該是說 D 跟 B 比較, B 比 D weaken 來的多, 因為　Ｄ只有講說前面的溫暖的空氣很快就冷掉了, 然後就散掉了, 跟B 比起來, 沒有一看就是當頭喝棒就知道是weaken.

我知道我解釋的很差, 有誰可以幫忙啊??

[dibert8]

(D) 幫忙解釋熱風的效果, 傾向於 strengthen
(B) 答案長相:否定因 (題目:吹前窗,前窗的霜溶化; 弱化:不吹,霜就溶化了,後窗是出題者拿來障眼的)