16.
如图所示,直线AB,CD,EF相交于点O,且AB⊥CD于点O,∠BOE=70°,则∠FOD等于( )
| A. | 10° | B. | 20° | C. | 30° | D. | 40° |
12.已知点A是反比例函数图象上一点,它到原点的距离为5,到x轴的距离为3,若点A在第二象限内,则这个反比例函数的表达式为( )
0 306922 306930 306936 306940 306946 306948 306952 306958 306960 306966 306972 306976 306978 306982 306988 306990 306996 307000 307002 307006 307008 307012 307014 307016 307017 307018 307020 307021 307022 307024 307026 307030 307032 307036 307038 307042 307048 307050 307056 307060 307062 307066 307072 307078 307080 307086 307090 307092 307098 307102 307108 307116 366461
| A. | y=$\frac{12}{x}$ | B. | y=-$\frac{12}{x}$ | C. | y=$\frac{1}{12x}$ | D. | y=-$\frac{1}{12x}$ |