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第1题

I have _________ some courses and software to my Smartphone, and I find they are very interesting and easy to use. 回答错误
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第2题

We can certainly deliver high-quality education to many students at much ________ cost. 回答错误 单选题 (10 分) 0分 A. low
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第3题

What is the attitude of the writer to online courses? 5 A. neutral B. negative C. positive
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第4题

The teachers hold 4 to answer questions that the students have posted. A. virtual office hours B. face
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