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第1题

Online courses require students to make decisions ________ on facts as well as experience. A.to base B.basing C.base
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第2题

5 设函数f(x)在[a,b]连续，在(a，b)可导，f’(x)>0.若f(a)·f(b)<0，则y=f(x)在(a，b)( ) A、 不存在零点 B、 存在唯一零点 C、
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第3题

5 It is often the case___as ___anything is possible for those who hang on to hope. A、正确 B、错误
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第4题

When people are segregated in ________ workshops, they miss out on the opportunities of interacting, working in a meanin
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