题库
题库
A．to develop microchips with thousands of odor receptors
B．to invent chips sensitive to various chemicals
C．to design a computer program to sort out smells
D．to find chemicals that can alter the electrical current passing through
| 单选题 | By signing the lease we made a ________ to pay a rent of $ 150 a week. | 查看答案 |
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| 单选题 | A potential problem which might be caused by the use of an artificial nose is ________. | 查看答案 |
| 单选题 | The main task now facing ecologists, environmental activists and conservationists is ________. | 查看答案 |
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| 单选题 | We can infer from the first two paragraphs that the industrialists disregard environmental protection chiefly because ________. | 查看答案 |
| 单选题 | What was the percentage of high school graduates admitted to universities in Britain thirty years ago? | 查看答案 |
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| 单选题 | Mike just discovered that his passport had ________ three months ago. | 查看答案 |
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| 单选题 | The younger person’s attraction to stereos cannot be explained only ________ familiarity with technology. | 查看答案 |
| 单选题 | David tends to feel useless and unwanted in a society that gives so much ________ to those who compete well. | 查看答案 |
| 单选题 | Since the two countries couldn’t ________ their differences, they decided to stop their negotiations. | 查看答案 |
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| 单选题 | Laudenslager’s experiment showed that the immune system of those rats who could turn off the electricity ________. | 查看答案 |
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| 单选题 | Some studies confirmed that this kind of eye disease was ________ in tropical countries. | 查看答案 |