11.
如图,AB为⊙O的弦,AB=6cm,OC⊥AB于D,交⊙O于点C,且CD=1cm,则⊙O的半径为( )
| A. | 5cm | B. | 6cm | C. | 8cm | D. | 10cm |
10.下列计算,正确的是( )
| A. | (-2)-2=4 | B. | 20×2-3=-$\frac{1}{8}$ | C. | 46÷(-2)6=64 | D. | $\sqrt{6}$-$\sqrt{2}$=2 |
8.
如图,△ABC∽△BDC,BC=$\sqrt{6}$,AC=3,则CD的长为( )
| A. | 1 | B. | 2 | C. | 3 | D. | 4 |
7.已知方程组$\left\{\begin{array}{l}{ax+by=6}\\{bx+ay=3}\end{array}\right.$的解为$\left\{\begin{array}{l}{x=2}\\{y=-1}\end{array}\right.$,则a,b的值分别为( )
| A. | 5,4 | B. | 4,5 | C. | -5,4 | D. | 5,-4 |
6.
如图,在等腰Rt△ABC中,∠ABC=90°,A(p,0),B(0,r),点C在第四象限,BC与x轴交于点D(q,0),x轴恰好平分∠BAC,则点C的坐标为( )
| A. | (r,$\frac{p-q}{2}$) | B. | (-$\frac{p}{2}$,$\frac{p-q}{2}$) | C. | (r,p+q) | D. | (2q,$\frac{p-r}{2}$) |
4.若3<m<5,则$\sqrt{(3-m)^{2}}$-$\sqrt{(m-5)^{2}}$等于( )
0 292024 292032 292038 292042 292048 292050 292054 292060 292062 292068 292074 292078 292080 292084 292090 292092 292098 292102 292104 292108 292110 292114 292116 292118 292119 292120 292122 292123 292124 292126 292128 292132 292134 292138 292140 292144 292150 292152 292158 292162 292164 292168 292174 292180 292182 292188 292192 292194 292200 292204 292210 292218 366461
| A. | -2 | B. | -2m+8 | C. | 2m-8 | D. | -2m+2 |