Many crimes are committed by some bad people, an example of which is fraud, a crimemoney is stolen by cheating others. A.which B.that C.whose D.where 答案:B 解析: 略科赫采用一定的步骤来证明某种疾病是由特定细菌引起的,其步骤包括: ①向动物注入细菌以产生同原来一样的疾病 ②从许多病例中分离到同样的细菌 ③从感染的动物体得到同原来一样的细菌 ④将这种细菌进行纯化培养。以上步骤正确的顺序是 A、①④②③ B、①②③④ C、②④①③ D、②①④③