【单选题】What time will the film start?
【单选题】经过抛物线y 2 =4x的焦点,斜率为-2的直线方程是( )
【单选题】过点M(-2,0)的直线l与椭圆x 2 +2y 2 =2交于P 1 ,P 2 ,线段P 1 P 2 的中点为P.设直线l的斜率为k 1 (k 1 ≠0),直线OP的斜率为k 2 ,则k 1 k 2 等于( )
【单选题】听力原文:M: Will you please return my stop watch? I need it to time the races tomorrow. W: Oh, hum. I'm not sure how to tell you. But it fell on the ground and now the second hand doesn't work. M: Well, d...
A.
She needs a watch that shows seconds.
B.
She can't find the man's stopwatch.
C.
She damaged something she borrowed from the man.
D.
She can't assist the man tomorrow.
【单选题】在xoy平面内,如果直线l的斜率和在y轴上的截距分别为直线2x-3y+12=0的斜率之半和在y轴上截距的两倍,那么直线l的方程是( )
【判断题】假定生产函数 ,则该生产函数所显示的规模报酬不变。( )
【判断题】假定生产函数 ,则该生产函数所显示的规模报酬递减。( )
【判断题】假定生产函数 ,则该生产函数所显示的规模报酬不变。( )
【单选题】听力原文:W: I'd like to see the an exhibition tomorrow, Can you tell me what time it's open? M: Yes. it's open from 8 until 6, but there's an hour lunch break. Q: For how many hours is the art exhibition ...