题目

下列有关实验中选择实验试剂不正确的是（ ） A．制作口腔上皮细胞临时装片应先在载玻片上滴一滴生理盐水B．可用氢氧化钠溶液检测人体呼出的气体中含有较多二氧化碳C．“馒头在口腔中的变化”实验中可用碘液检验淀粉的存在D．“绿叶在光下制造有机物”实验中用酒精对叶片进行脱色处理 答案：BMy mother said he ________ swimming if it ________ the next day. A.will go; not rainedB.would go; wasn't rainC.will go; doesn't rainD.was going; didn't rain