﹣Could you please tell me____?
﹣In a village in Guilin.( )
when were you born.
when you were born
where you were born
where were you born.
如图,已知 AC 是 ⊙ O 的直径,点 B 在圆周上(不与 A 、 C 重合),点 D 在 AC 的延长线上,连接 BD 交 ⊙ O 于点 E ,若 ∠ AOB = 3 ∠ ADB ,则 ( )
A. DE = EB B. 2 DE = EB C. 3 DE = DO D. DE = OB
设函数 y = k x ( k ≠ 0 , x > 0 ) 的图象如图所示,若 z = 1 y ,则 z 关于 x 的函数图象可能为 ( )
A.B.
C.D.
已知甲煤场有煤518吨,乙煤场有煤106吨,为了使甲煤场存煤是乙煤场的2倍,需要从甲煤场运煤到乙煤场,设从甲煤场运煤 x 吨到乙煤场,则可列方程为 ( )
A. 518 = 2 ( 106 + x ) B. 518 − x = 2 × 106
C. 518 − x = 2 ( 106 + x ) D. 518 + x = 2 ( 106 − x )
下列各式变形中,正确的是 ( )
A. x 2 ⋅ x 3 = x 6 B. x 2 = | x |
C. ( x 2 − 1 x ) ÷ x = x − 1 D. x 2 − x + 1 = ( x − 1 2 ) 2 + 1 4
如图是某市2016年四月每日的最低气温 ( ° C ) 的统计图,则在四月份每日的最低气温这组数据中,中位数和众数分别是 ( )
A. 14 ° C , 14 ° C B. 15 ° C , 15 ° C C. 14 ° C , 15 ° C D. 15 ° C , 14 ° C