问题
读图填空题
引起传染病的细菌、病毒和 等生物，称为病原体。
答案
寄生虫
题目分析：引起传染病的细菌、病毒和寄生虫等生物，称为病原体。
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引起传染病的细菌、病毒和 等生物，称为病原体。
寄生虫
题目分析：引起传染病的细菌、病毒和寄生虫等生物，称为病原体。
| 根据句意，选择方框中所给的词语填空，每词只能用一次。 | |
2. I want to be a professional soccer player, so I ________ practice a lot now. 3. ________ there be much time between the two baseball games? 4. Alan was doing homework ________ I arrived. 5. ______ it is fine tomorrow, we'll go the Great Wall. |