科目:高中英语 来源:2016-2017学年河南省商丘市九校高一下学期期中联考英语试卷(解析版) 题型:阅读理解
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 an off taste. Many people think that this is because of microorganisms(微生物). 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 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(过滤) 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.
1.Tap water begin to acquire an off taste because of ________.
A. BPAB. the glassC. the microorganismD. carbon dioxide
2.According to Paragragh 2, tap water that's been left sitting out for 12 hours ________.
A. tastes betterB. is still safe to drink
C. contains few microorganismsD. is most likely undrinkable
3.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. Refill them with fresh water.
C. Use them after they cool down.D. Clean them and use them again.
4.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 can cause great harm to people.
D. It is the main material to make plastic.
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科目:高中英语 来源:2016-2017学年山东省高二下学期第一次月考英语试卷(解析版) 题型:阅读理解
Dear Betty,
My roommate’s family wants me to celebrate Thanksgiving Day with them in their home. I accepted the invitation, and I’m excited about going, but I’m a little nervous about it, too. The social customs in my country are different from those here, so I’m a little worried about making mistakes.
Should I bring a gift, such as candy or flowers? Should I arrive on time or a little late? At the dinner table, how can I know which fork or knife to use? How can I let the family know that I’m thankful for their kindness?
Yours,
Knowing Nothing
Dear Knowing Nothing,
It’s a good idea to bring a gift when you go to a dinner party. Flowers are always welcome, or you can bring a bottle of wine if you know the family drink it.
You should arrive on time or five to ten minutes late. Don’t get there early. If you are going to be more than fifteen minutes late, you should call and tell them.
Try to relax at the dinner table. If you don’t know how to use the right fork, knife or spoon, just watch the other guests, and follow them. If you still have no idea of what to do, don’t be shy about asking the person next to you; it’s better to ask them than to be silently uncomfortable and nervous.
If you like the food, say so. Of course, you’ll thank the host and hostess for the meal and for their kindness. It’s also a good idea to send a card to thank them the day after.
Yours,
Betty
1.Knowing Nothing wrote a letter to Betty to _____.
A. tell Betty some good news B. invite her to dinner
C. answer some questions D. ask for some advice
2.According to Betty, Knowing Nothing ______ when going to a dinner party.
A. can only bring some flowers
B. should arrive on time or five to ten minutes late
C. can’t bring wine
D. should arrive twenty minutes late
3.Betty does NOT advise Knowing Nothing to _____.
A. keep silent at table
B. watch the other guests
C. ask the person beside him
D. relax at the dinner table
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科目:高中英语 来源: 题型:阅读理解
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