摘要：下列物质能使紫色石蕊变蓝色的是··································································· ( ) ①碳酸钠溶液 ②白醋 ③雪碧汽水 ④少量生石灰放入水中 ⑤蒸馏水 ⑥食盐水 ⑦氨水 A.②③⑥⑦ B.①④⑥ C.③④⑥⑦ D.①④⑦

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