题目内容

Part I — (Para. 1)The college today is being transformed into ___________________ by a fleet of laptops, smartphones and Internet connection 24 hours a day.

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Part II — (Paras. 2-6)Colleges have become the ___1_ in the world. And this digital transformation has brought students 2_____ for their learning and lives.

Part III — (Paras. 7-11)The ________1_ has developed fast on campus. In order to _2_ and attract students, colleges are competing with 3___.

Part IV — (Para. 12)The anywhere-anytime access has already _____1 in education. With the widespread application of digital technology, we are going to produce _2______________________________________.

在标定Na2S2O3 实验中,加入淀粉指示剂应该在:

A. 滴定开始;
B. 反应中间;
C. 反应结束;
D. 接近终点