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把管内的氢氧化钠残液倒入水中,你就会发现:溶液会使红色石蕊试纸变蓝。
Turn the remnant of sodium hydroxide in the tube into water, and you'll find the solution turns red litmus blue.
youdao
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把管内的氢氧化钠残液倒入水中,你就会发现:溶液会使红色石蕊试纸变蓝。
Turn the remnant of sodium hydroxide in the tube into water, and you'll find the solution turns red litmus blue.
youdao