2. 外语
  3. People seek more_____ventilation facilities which can operate very quietly in houses and buildings.

People seek more_____ventilation facilities which can operate very quietly in houses and buildings.

admin2011-04-03  39
问题 People seek more_____ventilation facilities which can operate very quietly in houses and buildings.
选项 A、compact
B、exceptional
C、effective
D、considerate
答案C
解析 本题应当选择适当的形容词。effective在这里是“有效的”的意思。
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