--- You’ve left the water running.
--- Oh, I have. _______ and turn it off.
A.I go B. I’ve gone C. I’ll go D. I’m going
高一英语单项填空中等难度题
--- You’ve left the water running.
--- Oh, I have. _______ and turn it off.
A.I go B. I’ve gone C. I’ll go D. I’m going
高一英语单项填空中等难度题查看答案及解析
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(获得) 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(假设) 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. BPA B. carbon dioxide
C. the glass D. the microorganism
2.According to Paragragh 2 , tap water that's been left sitting out for 12 hours____.
A. is still safe to drink B. tastes better
C. contains few microorganisms D. 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. Clean them and use them again.
C. Use them after they cool down.
D. Refill them with fresh water.
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.
高一英语阅读理解中等难度题查看答案及解析
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(获得) 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(假设) 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 biphenyl-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. carbon dioxide B. BPA
C. the glass D. the microorganism
2.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
3.What should we do with plastic water bottles that have been left out in the sun or in the car?
A. Use them after they cool down.
B. Clean them and use them again.
C. Throw them away.
D. Refill them with fresh water
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 is the main material to make plastic.
D. It can cause great harm to people.
高一英语阅读理解中等难度题查看答案及解析
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. BPA B. the glass C. the microorganism D. carbon dioxide
2.According to Paragragh 2, tap water that's been left sitting out for 12 hours ________.
A. tastes better B. is still safe to drink
C. contains few microorganisms D. 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.
高一英语阅读理解中等难度题查看答案及解析
Don’t leave the water ___ while you brush your teeth.
A．run B．running C．being run D．to run
高一英语单项填空困难题查看答案及解析
Don’t leave the water ______ while you brush your teeth.
A．run B．running C．being run D．to run
高一英语单项填空中等难度题查看答案及解析
Don’t leave the water______ while you brush your teeth.
A. run B. being running C. to run D. running
高一英语单项填空简单题查看答案及解析
Don’t leave the water ______ while you brush your teeth.
A．run B．running C．being run D．to run
高一英语单项填空中等难度题查看答案及解析
Don’t leave the water ______ while you brush your teeth.
A. run B. running C. being run D. to run
高一英语单项填空困难题查看答案及解析
--- You've left the light on.
--- Oh , so I have. _____and turn it off.
| A．I've gone | B．I'll go | C．I go | D．I'm going |
高一英语单项填空简单题查看答案及解析