设是抛物线，并且当点在抛物线图象上时，点在函数的图象上，求的解析式.
图7是《苏联和中国的粮食产量(1950-1984)示意图》。造成20世纪50年代末两国粮食产量状况的相同因素是A.政策指导的失误B.土地所有制的变革C.市场经济体
The government took strong m ________ against drunk drivers.
给出下列各函数值： ①sin(－1 000°)；②cos(－2 200°)；③tan(－10)； . 其中符号为负的有( ) (A)① (B)② (C)③ (D)④
若正项等比数列满足，则其公比为 A. B. 2或-1 C. 2 D. -1
Mother asked me ______ computer games before finishing my homework. A. not play B. to play C. not to play D. to not play
在我国漫长的封建社会的历史上，农民都必须承担沉重的封建义务，包括 （ ）①赋税 ②地租 ③兵役 ④徭役 A．①②③ B．②③④
In American crime movies, policemen search crime scenes for anything that might belong to a criminal— bits of fingernail , blood or hair— in order to find out who they are. What they hope
