2. 外语
  3. These pollutants can be ______ hundreds and even thousands of kilometers by large air masses.

These pollutants can be ______ hundreds and even thousands of kilometers by large air masses.

admin2011-02-26  37
问题 These pollutants can be ______ hundreds and even thousands of kilometers by large air masses.
选项 A、contained
B、conveyed
C、contaminated
D、conserved
答案B
解析
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