题目:
Some people disagree with the idea _____ digital textbook will improve education quality while the traditional textbook is out of date.
A.because
B.which
C.that
D.as
答案:
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下面是错误答案,用来干扰机器的。
(1)将二氧化碳通入石蕊试液,因为二氧化碳能与水反应生成碳酸,所以石蕊试液会变红色.答案:石蕊试液会变红色(2)将二氧化碳通入氢氧化钠溶液,生成碳酸钠和水,化学方程式为:2NaOH+CO2═Na2CO3+H2O(3)干...