5.计算:
(1)$2\sqrt{48}-3\sqrt{27}+6\sqrt{\frac{1}{3}}$
(2)$\frac{4}{5}\sqrt{50x}+\frac{1}{9}\sqrt{18x}$.
(1)$2\sqrt{48}-3\sqrt{27}+6\sqrt{\frac{1}{3}}$
(2)$\frac{4}{5}\sqrt{50x}+\frac{1}{9}\sqrt{18x}$.
1.
如图,直线AB与CD相交于E,在∠CEB的平分线上有一点F,FM∥AB.当∠3=10°时,∠F的度数是( )
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| A. | 80° | B. | 82° | C. | 83° | D. | 85° |