When products made in factories________，they ...

When products made in factories________，they are thrown away as garbage．

高三英语单项填空简单题查看答案及解析

When products made in factories________，they are thrown away as garbage．

A．come to an end    B．are put to use    C．are used up  D．wear out

高三英语单项填空中等难度题查看答案及解析

Products made in this factory ____ well; they have sold ___all their products.

高三英语单项填空中等难度题查看答案及解析

We produce 500 billion of plastic bags in a year worldwide and they are thrown away polluting oceans,  killing wildlife and getting dumped in landfills where they take up to 1000 years to decompose. Researchers have been unsuccessfully looking for a solution.

The 16-­year ­old Canadian high school student, Daniel Burd, from Waterloo Collegiate Institute,

has discovered a way to make plastic bags degrade(分解) in as few as 3 months, a finding that won him first prize at the Canada－Wide Science Fair, a $10 000 prize, a $20 000 scholarship, and a chance to revolutionize a major environmental issue.

Burd's strategy was simple: Since plastic does eventually degrade, it must be eaten by microorganisms (微生物). If those microorganisms could be identified, we could put them to work eating the plastic much faster than under normal conditions.

With this goal in mind, he ground plastic bags into a powder and concocted(调制) a solution of household chemicals, yeast(酵母) and tap water to encourage microbes growth. Then he added the plastic powder and let the microbes work their magic for 3 months. Finally, he tested the resulting bacterial culture on plastic bags, exposing one plastic sample to dead bacteria as a control. Sure enough, the plastic exposed to the live bacteria was 17% lighter than the control after six weeks.

The inputs are cheap: maintaining the required temperature takes little energy because microbes produce heat as they work, and the only outputs are water and tiny levels of carbon dioxide.

“Almost every week I have to do chores and when I open the closet door, I have piles of plastic bags falling on top of me. One day, I got tired of it and I wanted to know what other people are doing with these plastic bags. The answer: not much. So I decided to do something myself.” said Daniel Burd.

1.Daniel Burd won first prize at the Canada－Wide Science Fair because________.

A. he found a new kind of microorganism

B. he contributed much to environmental protection

C. he found a way to degrade plastics in shorter time

D. he could encourage microbes growth in an easier way

2.Daniel Burd exposed one plastic sample to dead bacteria to ________.

A. make the live bacteria work better

B. test how effective his method was

C. know which bacteria worked faster

D. control the temperature in the process

3.Maintaining the required temperature takes little energy because ________.

A. plastics can get hot easily

B. microbes can produce heat themselves

C. much carbon dioxide is produced

D. the temperature can be controlled

4.Daniel Burd got his idea from ________.

A. his school textbook           B. the failure of researchers

C. his everyday work            D. the practice of other people

高三英语阅读理解中等难度题查看答案及解析

People are recycling many things which they　　　　 away in the past.

A. had thrown　　　　 B. will be throwing

C. were throwing　　 D. would have thrown

高三英语单项填空中等难度题查看答案及解析

People are recycling many things which they away in the past.

A. had thrown　　 　　　　 　　 B. will be throwing

C. were throwing　　 　　　　 D. would have thrown

高三英语单项填空中等难度题查看答案及解析

People are recycling many things which they away in the past.

A. had thrown　　 B. will be throwing

C. were throwing　　 D. would have thrown

高三英语单项填空中等难度题查看答案及解析

“Made in China 2025” aims to transform China from a product-making factory into a product-making power, ______________ driven by innovation and emphasizing quality over quantity.

A.the one that B.one that

C.one D.the one

高三英语单项填空中等难度题查看答案及解析

“Made in China 2025” aims to transform China from a product-making factory into a product-making power, ______________ driven by innovation and emphasizing quality over quantity.

A. the one that　　 B. one that

C. one　　 D. the one

高三英语单项填空中等难度题查看答案及解析

“Made in China 2025” aims to transform China from a product-making factory into a product-making power, ______ driven by innovation and emphasizing quality over quantity.

A. the one that　　 B. one that

C. one　　 D. the one

高三英语单项填空中等难度题查看答案及解析