Questions 14 through 16 are based on the following passage.1.
2.
3.
| A．It was expected to be a disaster. | B．It turned out to be a disaster. |
| C．It was spoiled by one girl. | D．All the students enjoyed it. |
| A．A thrilling exploration in the desert. | B．How GPS saved the survivors. |
| C．What is GPS and how it works. | D．The danger of space exploration. |
| A．It was created mainly for scientific research. | B．It works better in fine weather conditions. |
| C．It must be located on three satellites. | D．Its service is free of charge. |
更新时间：2019-01-09 21:39:06
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【知识点】 科学技术
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听力选择题-短对话
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【推荐1】What does the woman say about the data in the article?
| A．Reliable. | B．Convincing. | C．Questionable. |
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听力选择题-短文
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【推荐2】听下面一段独白，回答以下小题。
1. What led to Puri’s research?
2. What’s the problem with present monitoring systems?
3. How does ELSa work?
4. What does Jasper think of ElSa?
1. What led to Puri’s research?
| A．A wildlife exhibition. | B．Her family’s hope | C．A market visit. |
| A．They aren’t accurate. | B．They can’t catch pictures | C．They can’t locate hunters |
| A．By using better visual recognition. |
| B．By analyzing movement patterns. |
| C．By studying animals’ living situations. |
| A．It is not as good as his system |
| B．It will stop much illegal hunting. |
| C．Its performance needs to be proved. |
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听力选择题-短文
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适中
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【推荐3】听下面一段独白，回答以下小题。1.
2.
3.
| A．By depositing layers of material on top of each other. |
| B．By creating a solid object on paper. |
| C．By laying down ink on a 2D material. |
| D．By setting down layers of different ingredients. |
| A．It can make items with a water-absorbent material. |
| B．It can manufacture shape-shifting 3D structures. |
| C．It can print 3D items using different materials. |
| D．It can double 3D items in volume in water. |
| A．Developing numerous new materials. |
| B．Using a water-absorbent material in projects. |
| C．Having a wide range of applications. |
| D．Producing a framework that can fold and stretch. |
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