Question

【题目】 There's much to see under the sea, but you need to remember that light behaves differently in water than in air. The objects appear closer to you than they exactly are. You might find yourself reaching out to touch something and completely missing it.

Objects under water will appear larger than they would on the surface, too. Be careful not to tell any stories about the big fish that got away. That fish might not be so big after all! It's just because sometimes things can seem to be as much as about 33 percent bigger in water!

What's more, in deeper water, colors just don't seem as bright. In fact, it looks as if some colors are missing. Remember the color of an object results from the wavelengths (波长) of light that are reflected (反射) from its surface. And light is taken in as it moves down through the water.

Swimmers wear wet suits to keep warm underwater. Let's take a bright red, yellow, and blue wet suit as an example. These colors are hard to miss on the surface of water. Watch carefully the changes in color as you descend in the water. The red part now looks almost black because the red light wavelengths, the longest among these three colors, are missing. As you go down deeper, the same thing will happen to the yellow part and in the end to the blue part. Even at a place of about 6 to 9 meters underwater, you will look terrible, like a ghost! And you have to wait for your return to the surface to enjoy the bright colors again!

【1】You miss the object underwater when you want to touch it because________.

A.your eyesight is quite poor

B.you are not quick enough

C.it is not as close as it seems

D.it disappears very quickly

【2】The example of the wet suit is used to explain the change of________of an object underwater.

A.the colorB.the sizeC.the positionD.the weight

【3】The underlined word "descend" probably means________ in this passage.

A.go outB.go upC.go inD.go down

【4】Which of the following is true?

A.The wavelengths of red light are longer than those of blue light.

B.A four-meter-long fish looks three meters long underwater.

C.Much water will be taken in by the swimmer deep in the water.

D.You will see a ghost if you go as deep as 6 to 9 meters into the sea.

【5】The best title of this passage is________.

A.The Standard of Color UnderwaterB.The Direction of Light Underwater

C.The Brightness of Color UnderwaterD.The Behavior of Light Underwater

Answer 1

【答案】

【1】C

【2】A

【3】D

【4】A

【5】D

【解析】

本文大意：这是一篇说明文。文章主要讲解了一些水下光学现象，并举例说明水下颜色变化的原因。

【1】细节理解题，由第一段第二句The objects appear closer to you than they exactly are.可知，水下的物体没有看上去那么近，所以有的时候你伸手去够水里的东西，却够不着。故选C。

【2】细节理解题，由第四段第四句 Watch carefully the changes in color as you descend in the water.可知，潜水衣的例子被用来解释说明水下物体颜色的变化。故选A。

【3】词义猜测题，由第四段第六句"As you go down deeper.以及下文提到随着潜水深度的加深，颜色逐渐变化。可知，划线的descend在文中可能是“下潜”的意思。故选D。

【4】推理判断题，根据“The red part now looks almost black because the red light wavelengths, the longest among these three colors, are missing.”可知，红色的光波是三种颜色中波光最长的 ，故A正确；根据“just because sometimes things can seem to be as much as about 33 percent bigger in water!只是因为有时候水里的东西看起来要比在陆地上大33%！”故B错误；选项C说的是很多水会被深水中的游泳者吸收。文中并没有提及，故C错误；根据“Even at a place of about 6 to 9 meters underwater, you will look terrible, like a ghost!即使在水下6到9米的地方，你也会看起来很可怕，像个幽灵！”只是看起来像幽灵一样，而不是遇到幽灵，可知D错误，故选A。

【5】最佳标题，本文首段首There's much to see under the sea, but you need to remember that light behaves differently in water than in air. 是文章的主题句，通读全文并结合主题句可知，文章主要讲解了一些水下光学现象。故选D。