题目内容
逆转录酶催化的反应是 、 、 以 为模板合成第二条 DNA 互补链。
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“We shall know a word by the company it keeps.” This statement represents _______.
Words that are close in meaning are called ______________.
Decide whether the following statements are true or false.Dialectal synonyms can often be found in different regional dialects such as British English and American English but cannot be found within the variety itself, for example, within British English or American English.
Behaviorists attempted to define the meaning of a language form as the situation in which the speaker utters it and the response it calls forth in the hearer.
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