Doyoudrinkwaterthat'sbeenleftsittingoutovernightorevenf...
問題詳情:
Do you drink water that's been left sitting out overnight or even for another day? Have you noticed it tastes different?
Tap water that has been left to sit out slowly begins to acquire(獲得) off taste. Many people think that this is because of microorganisms. But that's not what makes old water taste not fresh. For that we can thank carbon dioxide. After about 12 hours, tap water starts to go flat as carbon dioxide in the air starts to mix with the water in the glass, lowering its pH and giving it an off taste. But it's most likely safe to drink.
However, back to those microorganisms. If you use a dirty glass day after day, there is more of a chance of bacteria making themselves known; a risk that increases if you share the glass with another mouth as well. But assuming(假設) you use a fresh glass every few days, you probably won't have a problem unless the glass has been touched by dirty fingers, and especially if those dirty fingers went unwashed after using the bathroom.
As for plastic water bottles that have been left out in the sun or in the car, step away from the bottle, warns Dr. Kellogg Schwab, director of the Johns Hopkins University Water Institute. "A chemical called bisphenol-A, or BPA, along with other things used to make plastic can leach(過濾) into your water if the bottle heats up or sits in the sun," he explains. BPA, as you probably know, has been linked to everything from heart disease to cancer. Schwab also adds that plastic used for commercial bottled water isn't meant to be washed or refilled, so use only one time and recycle. Or don't buy them at all; use refillable water bottles instead.
24. Tap water begin to acquire an off taste because of______ .
A. the glass B. BPA
C. carbon dioxide D. the microorganism
25. According to Paragraph 2, tap water that's been left sitting out for 12 hours____.
A. contains few microorganisms B. is still safe to drink
C. tastes better D. is most likely undrinkable
26. What should we do with plastic water bottles that have been left out in the sun or in the car?
A. Throw them away. B. Clean them and use them again.
C. Use them after they cool down. . D. Refill them with fresh water
27. Which of the following is true about BPA?
A. It is safe for people to use. B. It is a kind of new material.
C. It is the main material to make plastic. D. It can cause great harm to people.
【回答】
CBAD
知識點:閱讀理解
題型:閱讀理解
-
以下各組國家中,人口增長模式不同的是A.阿曼和孟加拉國 B...
問題詳情:以下各組國家中,人口增長模式不同的是A.阿曼和孟加拉國 B.巴西和匈牙利C.澳大利亞和美國 D.韓國和新加坡【回答】B知識點:人口與地理環境...
-
讀下圖,回答3—4題3.水迴圈中A.①環節是水汽輸送,中緯西風是其主要動力B.②環節是降水,主要集中在春、秋季...
問題詳情:讀下圖,回答3—4題3.水迴圈中A.①環節是水汽輸送,中緯西風是其主要動力B.②環節是降水,主要集中在春、秋季節C.③環節是地表徑流,徑流量季節和年際變化大D.④環節蒸發的水汽,大部分被輸送到陸地上空4.關於圖中*、乙、*、丁四處的敘述,正確的是A.*處為向斜山,主要由...
-
下列各組中,含有離子晶體、分子晶體、原子晶體各一種的是( )A.HCl、H2SO4、S ...
問題詳情:下列各組中,含有離子晶體、分子晶體、原子晶體各一種的是( )A.HCl、H2SO4、S B.金剛石、Na3PO4、MgC.HF、SiC、Ar D.H2O、SiO2、K2CO3【回答】D知識點:物質結構元素週期律單元測試題型:選擇題...
-
圖3-2-3中是四個圖形,則下面對圖形的敘述正確的個數是( )圖3-2-3①線段AB與*線MN不相交 ②點...
問題詳情:圖3-2-3中是四個圖形,則下面對圖形的敘述正確的個數是( )圖3-2-3①線段AB與*線MN不相交 ②點M線上段AB上③直線a與直線b不相交 ④延長線*線AB,則會通過點CA.0 B.1 C.2 D.3【回答】思路解析:“*線MN”不僅告訴我們MN是...
相關文章
- Doyoudrinkwaterthat'sbeenleftsittingoutovernightoreve...
- —Jessie,don'tyouthinkitexcitingtoskateonthefrozenrivern...
- Doyoudrinkwaterthat'sbeenleftsittingoutovernightoreve...
- Doyoudrinkwaterthat'sbeenleftsittingoutovernightoreve...
- Doyoudrinkwaterthat'sbeenleftsittingoutovernightoreve...
- 七選五閱讀There'splentyofadviceoutthereaboutwhattodotogettos...
- Doyoudrinkwaterthat'sbeenleftsittingoutovernightoreve...
- 任務型閱讀Doyouneedusefulandinterestingbooks?Herewe'vegotple...
- It'slateeveninginthemiddleofthewinter.Thesnowisdeep,but...
- Generally,students'innermotivationwithhighexpectationsf...