2. 外语
  3. Complete the summary using the list of words, A-H, below. Write the correct letters, A-H, in boxes 11-13 on your answer sheet. C

Complete the summary using the list of words, A-H, below. Write the correct letters, A-H, in boxes 11-13 on your answer sheet. C

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问题 Complete the summary using the list of words, A-H, below.
Write the correct letters, A-H, in boxes 11-13 on your answer sheet.
Comparison between Quartz clock and Atomic clock
The invention of quartz clock in early 20th century originated from the finding that a clock could be powered by electric current provided by pressurized quartz. It is still popular among buyers nowadays with a cheaper【R11】______compared with atomic clock. However, the atomic clock is the most accurate. Without【R12】______, the atomic clock relies on essential【R13】______ and thus can get rid of disturbance.
A price                 B accuracy        C resonances
D basis                 E precision        F similarity
G mechanical vibration    H moving parts
【R13】
选项
答案C
解析
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