填空题

What does the expression "this two-dimensional approach" (Para. 2) refer to

【参考答案】

Sharing information and performing tasks.
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Why do scientists use software rather than hardware in their experiment
单项选择题
A．All the students would like a formal ball.B．Raising money will be hard.C．The festival will begin the year nicely.D．The club needs some sports as well.
A．All the students would like a formal ball.
B．Raising money will be hard.
C．The festival will begin the year nicely.
D．The club needs some sports as well.
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