1.表示理解;
2.分析利弊;
3.你的建议。
注意：1)词数100左右;
2)开头和结尾已给出，不计入总词数。
Dear Jim,
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Yours,
Li Hua
| in addition turn one’s back break down a variety of live in harmony run out maintain friendships be concerned with |
A
Friendship clubs provide a platform for people to take part in
B
Nature is our home. Humans and other living things on the planet couldn’t survive without the resources that come from nature. We should take care of our “home” before it’s too late. If we keep overusing and destroying nature, it will finally
8 . If someone created a flying machine able to track you down by listening for your voice, you might be terrified. But what if you were trapped in ruins after a natural disaster and first responders couldn’t locate you? Maybe then a human-seeking drone (无人机) wouldn’t be such a terrible idea. That concept is the focus for engineers at Germany’s Fraunhofer FKIE Institute, who’ve built a drone to find people by detecting human screams.
The human seeking drone would be ideal for post-disaster situations, such as earthquakes, hurricanes and wildfires,” said Macarena Varela, one of the lead engineers. “They could hover over an area that rescue crews have difficulty getting to and locate exactly where people may be trapped.”
Locating people by sound presents its share of challenges. An auditory system would need to tell human cries from sounds that often happen in nature, such as animal calls and wind. It might also need to recognize patterns associated with kicking, clapping or other ways people try to get the attention of rescue teams.
Engineers took those situations into account when building out their concept drone. They recorded themselves screaming, tapping and creating other noises that might be a sign of people in trouble. Then, they analyzed each sound frequency to find common signatures and used those to train artificial intelligence software. They also worked to remove the noise created by the drone and other environmental sounds.
Once the software part was completed, the team placed tiny digital microphones under the drone and used signal processing techniques that enabled them to track where human noises are coming from. The microphones also enhanced the volume and clearness of the speech. So far, they have conducted successful open field experiments finding that the drone can estimate a victim’s location within a few seconds of picking up sound.
Next, they would like to add a higher frequency microphone to a drone to acquire more audio sound signals. The idea is to pick up noises from hundreds of meters away, Varela said. In the real world, victim’s location date might one day be sent wirelessly to emergency crews carrying a tablet.
1. What is the advantage of the human-seeking drone?| A．Its high speed of flying. | B．Its long working hours. |
| C．Its quick response to screams. | D．Its easy access to disaster scene. |
| A．Recognize human cries. | B．Send victim’s location data to a tablet. |
| C．Pick up sounds from far away. | D．Improve the quality of human screams. |
| A．Effects. | B．Features. | C．Symbols. | D．Situations. |
| A．developed higher frequency microphones for use on drones |
| B．coached Ai software to distinguish Human and natural sounds |
| C．rescued disaster victims by using drones to recognize human cries |
| D．completed outdoor experiments using drones to quickly locate victims |
9 . Turning soil, pulling weeds, and harvesting cabbage sound like tough work for middle and high school kids. And at first it is, says Abby Jaramillo, who with another teacher started Urban Sprouts, a school garden program at four low-income schools. The program aims to help students develop science skills, environmental awareness, and healthy lifestyles.
Jaramillo’s students live m neighborhoods where fresh food and green space are not easy to find and fast food restaurants outnumber grocery stores. “The kids literally come to school with bags of snacks and large bottles of soft drinks,” she says. “They come to us thinking vegetables are awful, dirt is awful, insects are awful.” Though some are initially scared of the insects and turned off by the dirt, most are eager to try something new.
Urban Sprouts’ classes, at two middle schools and two high schools, include hands-on experiments such as soil testing, flower-and-seed dissection, tastings of fresh or dried produce, and work in the garden. Several times a year, students cook the vegetables they grow, and they occasionally make salads for their entire schools.
Program evaluations show that kids cat more vegetables as a result of the classes. “We have students who say they went home and talked to their parents and now they’re eating differently,” Jaramillo says.
She adds that the program’s benefits go beyond nutrition. Some students get so interested in gardening that they bring home seeds to start their own vegetable gardens. Besides, working in the garden seems to have a calming effect on Jaramillo’s special education students, many of whom have emotional control issues. “They get outside,” she says, “and they feel successful.”
1. What do we know about Abby Jaramillo?| A．She grew up in a low-income family. | B．She used to be a health worker. |
| C．She owns a fast food restaurant. | D．She sets up Urban Sprouts. |
| A．The kids’ parents distrusted her. |
| B．Some kids disliked garden work. |
| C．Students had little time for her classes. |
| D．There was no space for school gardens. |
| A．Far-reaching. | B．Predictable. |
| C．Short-lived. | D．Damaging |
| A．Rescuing School Gardens | B．Growing Vegetable Lovers |
| C．Experiencing Country Life | D．Changing Local Landscape |
YOLO, directed by Jia Ling, was the highest-grossing film in China over the Lunar New Year.
