2. 外语
  3. If the additives are ______, the University of California researchers recommended caution in approving any alternatives.

If the additives are ______, the University of California researchers recommended caution in approving any alternatives.

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问题 If the additives are ______, the University of California researchers recommended caution in approving any alternatives.
选项 A、postponed up
B、phased up
C、phrased up
D、phased out
答案D
解析 词组搭配题目。
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