2. 外语
  3. With the introduction of the electronic computer, there is no complicated problem can be solved in a few hours.

With the introduction of the electronic computer, there is no complicated problem can be solved in a few hours.

admin2014-05-14  84
问题 With the introduction of the electronic computer, there is no complicated problem can be solved in a few hours.
选项 A、but
B、which
C、that
D、what
答案A
解析 but在英语句子中可用作关系代词，引导定语从句。但应特别注意but虽然形式上是肯定的，意义上却是否定的。这正是but和其它关系代词(who，that，which等)不同之处。
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