2. 外语
  3. They are studying whether the project of landing a manned disc on the Mars is ______.

They are studying whether the project of landing a manned disc on the Mars is ______.

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问题 They are studying whether the project of landing a manned disc on the Mars is ______.
选项 A、probable
B、feasible
C、reliable
D、available
答案B
解析 形容词辨义。probable意为“很可能的，大概的”，如：It probable that he has forgotten our appointment．(很可能他忘了我们的约会。)feasible意为“可行的，行得通的”，如：a feasible plan(可行的计划)；reliable意为“可靠的，可信赖的”，如：a reliable assistant(可靠的助手)；available意为“可用的，可得到的”，如：Chinese commodities available for export are varied．(中国可供出口的商品种类繁多。)题干中指计划是否能够实施，故应选B)。
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