Question

【题目】

Sometimes, you might not finish drinking your glass of water before you go to bed. You might want to drink it the next morning. But have you ever wondered if it is still safe to drink?

“If you have clean water in a clean glass, you’re fine to drink it for a day or two,” Kellogg Schwab from the Johns Hopkins University Water Institute in the US told Time.

But you may find that it tastes strange. That’s because after about 12 hours, the carbon dioxide in the air reacts with the water in your glass, slightly lowering its pH level.

Also, there might be more microorganisms in your water if you leave it out overnight. Microorganisms grow more quickly at room temperature. These microorganisms can stick to your glass. They can make you get sick more easily. But as long as you clean your glasses very often, this will not be a problem.

In countries like the US and UK, people often drink water directly from the tap . This is OK – however, tap water cannot be stored for a long time. Most experts say that tap water has a shelf life of six months, according to Zane Satterfield from West Virginia University, US. After six months, there is less chlorine in the water and bacteria start to grow. You’d better not drink the water otherwise you may get sick.

What about plastic water bottles? Schwab said people should be careful with them. If you leave a bottle of water under the sun or in a car for a long period of time, the plastic produces a chemical called BPA. This chemical can cause heart disease and cancer.

【1】According to the passage,the water in the glass tastes strange after about_______.

A. 12 hoursB. 2 hours

C. a day and a nightD. two days

【2】Why does the water taste strange after a night?

A. Because there is less chlorine in the water.

B. Because the glasses are dirty after a night.

C. Because the plastic produces a chemical called BPA

D. Because the carbon dioxide in the air reacts with the water , lowering its pH level.

【3】The underlined word “ microorganisms” in the fourth paragraph probable mean “________”

A. 漂浮物B. 微生物C. 抗生素D. 废弃物

【4】Which of the following is not true?

A. You may get sick more easily after you drink the water overnight.

B. It’s not a right way to leave a bottle of water under the sun for a long time.

C. Many people drink water directly from the tap because of no bacteria in the running water.

D. Kellogg Schwab advised us to drink clean water in a clean glass for a day or two.

Answer 1

【答案】

【1】A

【2】D

【3】B

【4】C

【解析】

短文大意：本文是科普类阅读，解释了玻璃杯里的水在12个小时后为什么尝起来很奇怪，为什么不能喝长期储存的自来水以及塑料瓶装的水。

【1】题意：根据文章，玻璃杯里的水在12个小时后尝起来很奇怪。考查细节理解。根据But you may find that it tastes strange. That’s because after about 12 hours, the carbon dioxide in the air reacts with the water in your glass, slightly lowering its pH level.（在大约12小时后，空气中的二氧化碳会与玻璃杯中的水发生反应，pH值会略有降低，这就导致了剩余的水的味道很奇怪），可知是12个小时选A。

【2】题意：为什么一晚上后水的味道会很奇怪?考查细节理解。A. Because there is less chlorine in the water. 因为水中的氯比较少。B. Because the glasses are dirty after a night. 因为经过一个晚上后，玻璃杯很脏。C. Because the plastic produces a chemical called BPA因为塑料会产生一种叫做BPA的化学物质。D. Because the carbon dioxide in the air reacts with the water, lowering its pH level.因为空气中的二氧化碳与水发生反应，降低了水的pH值。根据That’s because after about 12 hours, the carbon dioxide in the air reacts with the water in your glass, slightly lowering its pH level. 空气中的二氧化碳会与玻璃杯中的水发生反应使pH值会略有降低，可知选D。

【3】题意：第四段中标下划线的“microorganisms”可能是“________”的意思。考查词义理解。根据下文的介绍Microorganisms grow more quickly at room temperature. These microorganisms can stick to your glass. They can make you get sick more easily. But as long as you clean your glasses very often, this will not be a problem.，可知这是一种肉眼看不到的东西，“微生物”符合句意，故选B。

【4】题意：下列哪个选项是不正确的?考查细节判断。A. You may get sick more easily after you drink the water overnight. 喝了一夜的水，你可能会更容易生病。B. It’s not a right way to leave a bottle of water under the sun for a long time. 把一瓶水长时间放在太阳底下是不对的。C. Many people drink water directly from the tap because of no bacteria in the running water. 很多人直接从水龙头喝水，因为自来水里没有细菌。D. Kellogg Schwab advised us to drink clean water in a clean glass for a day or two.凯洛格·施瓦布建议我们用干净的玻璃杯喝一两天的清水。根据美国西弗吉尼亚大学萨特菲尔德的解释After six months, there is less chlorine in the water and bacteria start to grow. You’d better not drink the water otherwise you may get sick.，可知六个月后自来水中氯的含量减少细菌开始生长，C项说法错误，故选C。