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The modern age is an age of electricity. People are so 【S1】______ to electric lights, radio, televisions, and telephones that it
The modern age is an age of electricity. People are so 【S1】______ to electric lights, radio, televisions, and telephones that it
admin
2009-10-19
47
问题
The modern age is an age of electricity. People are so 【S1】______ to electric lights, radio, televisions, and telephones that it is hard to imagine what life would be like 【S2】______ them. When there is a power failure, people search 【S3】______ with the hands in darkness or candlelight, cars hesitate in the street 【S4】______ there are no traffic lights to guide them, and food 【S5】______ in silent refrigerators.
Yet people began to understand how electricity works only a little more than two centuries ago. Nature has 【S6】______ been experimenting in this field for millions of years. Scientists are 【S7】______ more and more that the living world may hold many interesting secrets of electricity that could benefit humanity.
All living cells send out 【S8】______ pulses of electricity. In fact, they are so small that sensitive 【S9】______ are needed to record them. As the heart beats, it sends out pulses of record; they form an electrocardiogram, which a doctor can study to determine how well the heart is working. It has been recently discovered that although individual cell only sends out small pulse, when large numbers of these cells are linked together, the effects can be 【S10】______ . Some interesting phenomenon in the animal world can thus be explained.
A about B maps C quickly D with
E discovering F astonishing G spoils H withoutI improve
J due to K used L tiny M apparently
N instruments O because
【S10】
选项
答案
F
解析
此处应填入形容词,根据上下文的逻辑推知,单个细胞发出的脉冲微弱,但是大量细胞聚集在一起,应该是大量、惊人的感觉
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0
大学英语四级
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