2. 外语
  3. Scientists are working hard to come up with a sure solution to the food______ for mankind.

Scientists are working hard to come up with a sure solution to the food______ for mankind.

admin2017-04-12  27
问题 Scientists are working hard to come up with a sure solution to the food______ for mankind.
选项 A、decline
B、rarity
C、scarcity
D、shortage
答案D
解析 shortage n．不足，缺少。decline n.下降，减少，衰落。rarity n．稀少，少见的人或东西(常与不定冠词连用)。scarcity n.缺乏，稀少。
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