Compared with the traditional ones, the new satellites ______. What does the underlined word "obstacle" probably mean? ______.

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问题 Compared with the traditional ones, the new satellites ______.
What does the underlined word "obstacle" probably mean? ______.

选项 A、An aim to achieve in the near future.
B、An imagination that kids usually have.
C、Something dangerous to terrify people.
D、Something difficult that stands in the way.

答案D

解析 obstacle意为“障碍”,所以选D。
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