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During the period 1490~1979 the main progress mentioned in this passage was ______. The word "scuba" is ______.
During the period 1490~1979 the main progress mentioned in this passage was ______. The word "scuba" is ______.
admin
2009-06-24
37
问题
During the period 1490~1979 the main progress mentioned in this passage was ______.
The word "scuba" is ______.
选项
A、a certain diver’s name
B、an original English word
C、named by the inventor
D、the first letters of five English words
答案
D
解析
由倒数第二段中的The most important advance, however, was the invention of a self-contained underwater breathing apparatus, which is called a "scuba"可知,scuba为self-contained underwater breathing apparatus五个单词首字母的缩写,意为"水肺",即"水下呼吸器"。
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