9.
如图,直线AB、CD相交于点O,OE平分∠BOD,OF平分∠COE,∠AOD:∠BOE=4:1,则∠AOF的度数为( )
| A. | 120° | B. | 125° | C. | 130° | D. | 135° |
4.下列说法中正确的个数有( )
(1)在同一平面内,不相交的两条直线必平行;
(2)同旁内角互补;
(3)相等的角是对顶角;
(4)从直线外一点到这条直线的垂线段,叫做这点到这条直线的距离;
(5)经过直线外一点,有且只有一条直线与已知直线平行.
(1)在同一平面内,不相交的两条直线必平行;
(2)同旁内角互补;
(3)相等的角是对顶角;
(4)从直线外一点到这条直线的垂线段,叫做这点到这条直线的距离;
(5)经过直线外一点,有且只有一条直线与已知直线平行.
| A. | 2个 | B. | 3个 | C. | 4个 | D. | 5个 |
3.
如图,下列条件不能证明△ABC≌△DCB的是( )
| A. | AB=DC,AC=DB | B. | ∠A=∠D,∠ABC=∠DCB | C. | BO=CO,∠A=∠D | D. | AB=DB,AC=DC |
2.使分式 $\frac{x-1}{(x-1)(x-2)}$有意义的x的值为( )
0 285929 285937 285943 285947 285953 285955 285959 285965 285967 285973 285979 285983 285985 285989 285995 285997 286003 286007 286009 286013 286015 286019 286021 286023 286024 286025 286027 286028 286029 286031 286033 286037 286039 286043 286045 286049 286055 286057 286063 286067 286069 286073 286079 286085 286087 286093 286097 286099 286105 286109 286115 286123 366461
| A. | x≠1 | B. | x≠2 | C. | x≠1 且 x≠2 | D. | x≠1或 x≠2 |