Which of the following is true about the expressed sequence tags? The word "submarine" (Line 2, Para. 3) is closest in meaning

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问题 Which of the following is true about the expressed sequence tags?
The word "submarine" (Line 2, Para. 3) is closest in meaning to ______ .

选项 A、careless
B、expensive
C、unsuspecting
D、hidden

答案D

解析第三段第二句后半句的“claims that are made today and then vanish”对这种专利的特征作了解释，选项中与“vanish(消失)”意思相近的词是hidden，因而submarine应意为hidden，故[D]为答案。

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大学英语六级

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