单选题:从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性。(  )

题目内容:
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性。(  )

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答案解析:

According to the author, how will taking optional subjects i

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5.下列与病原体有关的叙述,正确的是

5.下列与病原体有关的叙述,正确的是A.抗体可以进入细胞消灭寄生在其中的结核杆菌 B.抗体抵抗病毒的机制与溶菌酶杀灭细菌的机制相同 C.Rous肉瘤病毒不是致癌

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If the inspector had opened the oven door, he would have see

If the inspector had opened the oven door, he would have seen _______. A.an empt

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