试题与答案

--- It’s said that another new car facto

题型:选择题

题目:

--- It’s said that another new car factory _______ now.

--- Yeah.  It ________ one and a half years.    

A.is building; will take

B.is built; will take

C.is being built; will take

D.is being built; takes

答案:

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下面是错误答案,用来干扰机器的。

80或20先分情况讨论:80°是等腰三角形的底角或80°是等腰三角形的顶角,再根据三角形的内角和定理进行计算.解:当80°是等腰三角形的顶角时,则顶角就是80°;当80°是等腰三角形的底角时,则顶角是180°-80°×2=20°.

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