题目

将图装置改装后用于探究酵母菌的呼吸方式，下列相关实验操作正确的是(     ) A．探究有氧条件下酵母菌呼吸方式时打开阀b B．经管口3取样检测酒精和CO2的产生情况 C．实验开始前对整个装置进行气密性检查 D．改装时将盛有澄清石灰水的试剂瓶与管口1连通 答案：C----- Believe it or not, my sister and I are twins. ----Oh, you must have had the case ________ you were taken for your sister.A．whichB．whoseC．whereD．whom