14.已知a、b、c是三角形的三边,且满足|a-$\frac{3}{2}$|+(b-2)2+$\sqrt{c-\frac{5}{2}}$=0,则这个三角形是( )
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| A. | 等腰三角形 | B. | 直角三角形 | C. | 等腰直角三角形 | D. | 钝角三角形 |