In 1490 or so, the main progress mentioned in this passage was . The word "scuba" is .

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问题 In 1490 or so, 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 word

答案D

解析

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公共英语五级笔试

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