标题: 请教 gwd 5-33 [打印本页]

作者: smallkiddy 时间: 2006-3-16 14:03 标题: 请教 gwd 5-33

The surface of a certain planet reflects 80 percent of the light that strikes it. The clouds around the planet then absorb 40 percent of the reflected light. What percent of the light that strikes the planet is reflected from the surface and passes through the clouds without being absorbed?

A. 32%

A. 40%

B. 48%

C. 60%

D. 88%

answer: B

请教这题的思路。我得答案不一样，是 60％。也许题意理解错了。

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A. 32%

A. 40%

B. 48%

C. 60%

D. 88%

answer: B

请教这题的思路。 我得答案不一样， 是 60％。 也许题意理解错了。

请教这题的思路。我得答案不一样，是 60％。也许题意理解错了。