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题型:阅读选择 题类:常考题 难易度:普通

北京市101中学2019-2020学年八年级下学期英语6月月考英语试卷

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Human, Don't Come Too Close

When we see babies or pets, we can't help gently touching them to show our love. And they give us happy feelings back. But a recent study shows that it's different for plants.

A study, published inThe Plant Journal, shows that plants don't "like" to be touched. That's because touching changes their genes (基因) and, even worse, can slow their growth.

Professor Jim Whelan of the La Trobe Institute in Australia gave an explanation. "The lightest touch from a human, animal, insect, or even plants touching each other in the wind, leads to a huge gene change in the plant,"Science Daily reported.

Frequent touching from humans may change plants' genes and slow their growth.

In order to test the theory, the scientists did an experiment on plants. They grew a number of plants to the age of four weeks. Then they touched them with a paintbrush every 12 hours over a 36-hour period.

They found that as a response to the touch, the mitochondria (线粒体) in the plants had been partly destroyed. The mitochondria, as Science Alert noted, are the "powerhouse of the cell (细胞)". The mitochondria produce energy for the rest of the cell in both animals and plants.

If this "powerhouse" is weakened, the plants will lose a large amount of energy that should have supported their growth. Whelan further explained to Science Daily, "If the touching is repeated, then plant growth is reduced by up to 30 percent."

Although the process does have a strong effect on plants, usually the plants survive. Touching changes the plants, but it's not necessarily a bad change.

According to Science Alert, frequent touching or moving plants will make them grow shorter than other ones. The researchers believe this change, in some way, could be helpful. It may help plants fight threats to their health such as insects and bad weather.

The new research findings have led to a deeper understanding of the plants' response to touching. And the research might "open up new ways to reduce sensitivity (敏感性) and improve growth in the future", Science Alert reported.

(1)、Why did the scientists do the experiment?
A、To test if touching can change the genes of plants. B、To show that plants' and animals' genes are different. C、To tell when touching has effect on plants and animals. D、To find out why some plants grow more slowly than others.
(2)、What did the scientists find in their experiment?
A、Repeated touching shortened the plants' life by four weeks. B、Touching slowed down plant growth by reducing energy for growth. C、Repeated touching made plants die sooner than they were expected to. D、Mitochondria in the plants couldn't produce energy because of touching.
(3)、What do the scientists think of the fact that touch makes plants become shorter?
A、The plants will be more likely to be attracted by insects. B、The plants will be more easily harmed by bad weather. C、The plants will be less sensitive to being touched. D、The plants will be better at fighting dangers.
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People are always curious to know what things on the earth can be seen from space. Some of geographical features (地势) and man- made things are huge enough to be seen from hundreds of kilometres above. Here we list some huge things on the earth that can be seen from space. 

●Great Barrier Reef

The Great Barrier Reef which is more than 2, 000 kilometres long becomes the largest coral reef on the earth. It also becomes the largest living thing in this world that can be seen from space. The Great Barrier Reef connects more than 900 reef islands, lied in the eastern part of Australia. It is a home for about 1, 500 tropical(热带的) fish species. It also becomes the main place of divers and the finest tourist place in Australia. 

● Pyramids of Giza

One of the seven wonders of ancient world also becomes a favourite place for astronomers to take photos from space. It cannot be seen at all by eyes, so astronomers used a special camera for it. Within space images of Pyramids of Giza, the Great Sphin x which has a face of human but a body of lion can also be seen from space under possible conditions. 

●Himalayas

Himalayas, including the world's highest mountains, can be seen from space. Himalayas have more than 110 peaks rising to elevations of 24, 000 feet(7, 300 metres) or more above sea level. The width of Himalayas from south to north varies between 125 and 250 miles(200 and 400 km). Their total area amounts are about 230, 000 square miles(595, 000 square km). 

 阅读短文,回答问题

 When did you last say"I love you"to your father? If you can't remember, then you can get the chance this Father's Day in June.

 Generally compared to a mother, a father represents (代表) qualities like independence, confidence, courage and adventure. Also, a caring father can help their children get along with others, according to a study on Live Science. Fathers not only lead their children into their social circle but also teach them how to act and control(控制) their feelings.

 For example, Microsoft founder Bill Gates was quiet and didn't like to talk with others when he was a little kid. So his father often held family parties and let Bill play games with family members. "Games like soccer and swimming seemed to be silly at that time but they improved my ability of leading and getting along with others, " Gates once said in an interview.

 The US actor Will Smith learnt important lessons from small things taught by his father. His father once planned to pull down a wall of their shop and rebuild it. But little Will thought it was impossible. After a year and a half, they did it. "You say,'I'm going to lay this brick as perfectly as a brick can be laid.' You do that every single day. And soon you have a wall, "he said on a TV show.

"One father is more than a hundred schoolmasters, "the British poet George Herbert(1593—1633) once said. Do you agree?

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