题目

Only when the war was over ________.    A. He took everything back             B. Was everything taken back    C. Did everything take back            D. He has taken everything back 答案：B请据如图回答下列问题：（1）左图的微生物是________，右图的微生物为________．左图能产生可以杀死某些致病细菌的物质是________ （2）从图中可以看出它们都________（填“单”或“多”）细胞生物．在它们的细胞结构中没有________，自身不能制造有机物，主要是依靠图中结构________（填写序号）吸收营养物质．因此，它的营养方式是________ ．