题目

Environmental groups intend to _______ the pressure until the government changes the law. A.keep up       B.make up        C.pick up        D.bring up   答案：A18．关于曲线运动，下列说法正确的是（　　）A．一定是变速运动B．一定是变加速运动C．一定不是匀变速运动D．以上说法都错