Question

    First of all, it's a myth that no two snowflakes(雪花)are the same.  In 1988, a scientist found two exact same snow crystals(晶体)that had both formed in a snow storm in Wisconsin, USA.

Since then scientists have come to learn that snowflakes can only form into 35 different shapes. Although scientists are also not sure why exactly the various shapes of snowflake form, they have confirmed(确定)eight main shapes, with each of these eight shapes having several different variations(变化).

Second biggest myth, snow isn't white. It's actually colorless. Snow is made up of very small pieces of ice, and ice is translucent(半透明的), which means that light does not pass through it easily, but rather it gets reflected(反射).

When light hits a snowflake, it gets reflected back from the snowflake's many surfaces, often bouncing(弹跳)between these surfaces, and because of this that light is reflected back to our eyes as the color white. This is why, when we have a close look at a snowflake, it always looks clear, yet in reality appears as white.

1.What does the underlined word "myth" probably mean in the passage?

A.Something that is not true. B.Something that is amazing.

C.Something that is interesting. D.Something that is not good.

2.Which of the following statements is TRUE according to the passage?

A.Light can easily pass through ice.

B.A scientist found two different snow crystals.

C.When we have a close look at a snowflake, it looks clear.

D.Scientists are sure about the reasons why various shapes of snowflake form.

3.This passage is probably from  ________ .

A.a weather report B.a science magazine C.a science fiction D.a travel guide

Answer

1.A

2.C

3.B

【解析】

本篇是科普文章。纠正人们生活中错误的说法——不可能存在两片完全相同的雪花，雪是白色的。1988年，一名科学家发现了两个完全相同的雪结晶，了解到雪花有35种不同形状的造型。雪不是白色的，而是无色的。

1.词义猜测题。根据第一段的陈述——1988年，一名科学家发现了两个完全相同的雪结晶，而且这两片雪花都是在美国威斯康星州的一场雪暴中形成的，可知不存在两片完全相同的雪花的说法是错误的，故选A。

2.推理判断题。根据第三段“and ice is translucent, which means that light does not pass through it easily”，可知雪是由冰晶分子组成的，而冰是半透明的，也就是说光线不能很轻易地穿透它，所以A表述错误；根据第一段“In 1988, a scientist found two exact same snow crystals that had both formed in a snow storm in Wisconsin, USA”可知988年，一名科学家发现了两个完全相同的雪结晶，而且这两片雪花都是在美国威斯康星州的一场雪暴中形成的，所以B表述错误；根据第四段“when we have a close look at a snowflake, it always looks clear”，可知这就是为什么近看雪花，颜色是透明的，所以C表述正确；根据第二段“Although scientists are also not sure why exactly the various shapes of snowflake form”可知科学家也不清楚雪花会形成各种各样形状的准确原因，所以D表述错误；故选C。

3.推理判断题。a weather report天气预报；a science magazine科普杂志；a science fiction科幻小说；a travel guide旅游指南；本篇是科普文章，纠正人们生活中错误的说法——不可能存在两片完全相同的雪花，雪是白色的。推断文章来自科普杂志，故选B。