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在中考试题中,经常涉及到圆的计算,而解决这类问题时,学生往往感觉很棘手.如果我们通过巧设未知数列出方程,问题可能会迎刃而解.举例说明如下.
In the mid-term exams, which often involve round calculations, students often find it tricky to solve such problems. If we formulate the equations by default, the problem may be solved.