短文改错

短文改错

Plants can’t communicate by moving or making sounds, as most animals do. Instead, plants Produce volatile compounds, chemicals that easily change from a liquid to a gas. A flower’s sweet smell, for example, comes from volatile compounds that the plant produces to attract insects such as Bugs and bees.

Plants can also detect volatile compounds produced by other plants. A tree under attack by Hungry insets, for instance, may give off volatile compounds that let other trees know about the Attack. In response, the other trees may send off chemicals to keep the bugs away ——or even  Chemicals that attract the bugs’ natural enemies.

Now scientists have created a quick way to understand what plants are saying: a chemical Sensor（传感器）called an electronic nose. The “e-nose” can tell compounds that crop plants make When they’re attacked Scientists say the e-nose could help quickly detect whether plants are being Eaten by insects. But today the only way to detect such insects is to visually inspect individual Plants. This is a challenging task for managers of greenhouses, enclosed gardens than can house Thousands of plants.

The research team worked with an e-nose than recognizes volatile compounds. Inside the device, 13 sensors chemically react with volatile compounds Based on these interactions, the e-nose gives off electronic signals that the scientists analyze using computer software.

To test the nose, the team presented it with healthy leaves from cucumber, pepper and tomato plants, all common greenhouse crops. Then scientists collected samples of air around damaged leaves from each type of crop, These plants had been damaged by insects, or by scientists who made holes in the leaves with a hole punch（打孔器）. The e-nose, it turns out, could identify healthy cucumber, pepper and tomato plants based on The volatile compounds they produce, It could also identify tomato leaves that had been damaged. But even more impressive, the device could tell which type of damage ---- by insects or with a hole Punch ---- had been done to the tomato leaves.

With some fine-tuning, a device like the e-nose could one day be used in greenhouses to quickly spot harmful bugs, the researchers say. A device like this could also be used to identify fruits that are perfectly ripe and ready to pick and eat, says Natalia Dudareva, a biochemist at Purdue University in West Lafayette, Ind. who studies smells of flowers and plants. Hopefully, scientists believe, the device could bring large benefits to greenhouse managers in the near future.

We learn from the text that plants communicate with each other by____.

A. making some sounds        B. waving their leaves

C. producing some chemicals   D. sending out electronic signals

What did the scientists do to find out if the e-nose worked?

A. They presented it with all common crops.

B. They fixed 13 sensors inside the device.

C. They collected different damaged leaves.

D. They made tests on damaged and healthy leaves.

According to the writer, the most amazing thing about the e-nose is that it can___.

A. pick out ripe fruits

B. spot the insects quickly

C. distinguish different damages to the leaves

D. recognize unhealthy tomato leaves

We can infer from the last paragraph that the e-nose_____.

A. is unable to tell the smell of flowers

B. is not yet used in greenhouses

C. is designed by scientists at Purdue

D. is helpful in killing harmful insects

All over my garden I’ve planted nothing but roses, sweet and — if looked at far away — bright with color like sunset clouds, I’d be very happy if anyone of my visiting friends should desire to pick and take some for their homes. I trust that any friend of mine carrying the rose would disappear into the distance feeling that his emotions had been rekindled (重燃).

A close friend came for a visit the other day. I know her to be a lover of flowers and plants. And for that reason I told her at her departure that she should pick a bunch of roses to grace her bedroom. I promised that the smell of the roses would be wafted far, far away.

That girl friend of mine, tiptoeing into the garden in high spirits, smelt here and there, but in the end she didn’t pick a single rose. I said there were so many of them that she would pick as many as she’d like to; I told her that I was not a flower farmer and didn’t make a living out of them. Saying so I raised the scissors for the sacrifice of the flowers, but she stopped me, crying no, no, no!

To cut such beautiful roses would hurt one, she said. With her hands seizing at my sleeves, she told me that by no means should they be cut. Roses are the smiling face of the earth, and who could be so iron-hearted as to destroy a smile so charming?

My mind was thoroughly shocked: the ugly earth, the rough earth, the plain earth—it is for the reason of that smile that it wins the care and pity of people

1. The underlined word “wafted” in Paragraph 2 is closest in meaning to “__________”.

A. moved                    B. lost                      C. destroyed             D. felt

2.    The writer plants nothing but roses in her garden probably because __________.

A. she can make money out of them

B. her friends like them

C. she enjoys the roses very much

D. the roses can rekindle her friends’ emotions

3.Why did the writer’s close friend refuse to pick a single rose?

A. Because the roses were not beautiful

B. Because she did not like this kind of roses

C. Because the writer did not want to give her any

D. Because she loved the roses very much

4.What would be the best title for the passage?

A. A lovely rose garden.                                B. The smiling face of the earth

C. The pity of people to the roses.                  D. A lover of flowers

All over my garden I’ve planted nothing but roses, sweet and — if looked at far away — bright with color like sunset clouds, I’d be very happy if anyone of my visiting friends should desire to pick and take some for their homes. I trust that any friend of mine carrying the rose would disappear into the distance feeling that his emotions had been rekindled (重燃).

A close friend came for a visit the other day. I know her to be a lover of flowers and plants. And for that reason I told her at her departure that she should pick a bunch of roses to grace her bedroom. I promised that the smell of the roses would be wafted far, far away.

That girl friend of mine, tiptoeing into the garden in high spirits, smelt here and there, but in the end she didn’t pick a single rose. I said there were so many of them that she would pick as many as she’d like to; I told her that I was not a flower farmer and didn’t make a living out of them. Saying so I raised the scissors for the sacrifice of the flowers, but she stopped me, crying no, no, no!

To cut such beautiful roses would hurt one, she said. With her hands seizing at my sleeves, she told me that by no means should they be cut. Roses are the smiling face of the earth, and who could be so iron-hearted as to destroy a smile so charming?

My mind was thoroughly shocked: the ugly earth, the rough earth, the plain earth—it is for the reason of that smile that it wins the care and pity of people

The underlined word “wafted” in Paragraph 2 is closest in meaning to “__________”.

A. moved      B. lost     C. destroyed   D. felt

     The writer plants nothing but roses in her garden probably because __________.

A. she can make money out of them

B. her friends like them

C. she enjoys the roses very much

D. the roses can rekindle her friends’ emotions

Why did the writer’s close friend refuse to pick a single rose?

A. Because the roses were not beautiful

B. Because she did not like this kind of roses

C. Because the writer did not want to give her any

D. Because she loved the roses very much

What would be the best title for the passage?

A. A lovely rose garden.        B. The smiling face of the earth

C. The pity of people to the roses. D. A lover of flowers