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【单选题】
读者有超期罚款时,应如何处理?( )
A.
先交罚款,后借书
B.
先借书,后交罚款
C.
在毕业离校前还清超期罚款
D.
以上三个
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参考答案:
举一反三
【判断题】Roles within the buying center are socially constructed, which means people define how they will act in the business-to-business purchase process and how they will interact with others.
A.
正确
B.
错误
【单选题】The government reversed its decision to build nuclear reactors; now they will not be constructed.
A.
made
B.
stuck to
C.
ratified
D.
gave up
【简答题】The carpet on the floor was stained and torn, the windows nearly __________ with dirt, and the walls looked as if they had never been repainted since the place was constructed.
【简答题】(本小题满分12分)在直角坐标系xOy中,曲线C 1 的点均在C 2 :(x-5) 2 +y 2 =9外,且对C 1 上任意一点M,M到直线x=﹣2的距离等于该点与圆C 2 上点的距离的最小值. (1)求曲线C 1 的方程; (2)设P(x 0 ,y 0 )(y 0 ≠±3)为圆C 2 外一点,过P作圆C 2 的两条切线,分别与曲线C 1 相交于 点A,B和C,D.证明:当P在直线x=﹣4上运动时...
【简答题】已知定点A(﹣3,0),MN分别为x轴、y轴上的动点(M、N不重合),且AN⊥MN,点P在直线MN上, . (1)求动点P的轨迹C的方程; (2)设点Q是曲线x 2 +y 2 ﹣8x+15=0上任一点,试探究在轨迹C上是否存在点T?使得点T到点Q的距离最小,若存在,求出该最小距离和点T的坐标,若不存在,说明理由.
【简答题】在直角坐标系xOy中,曲线C 1 的点均在C 2 :(x-5) 2 +y 2 =9外,且对C 1 上任意一点M,M到直线x=-2的距离等于该点与圆C 2 上点的距离的最小值。 (1)求曲线C 1 的方程; (2)设P(x 0 ,y 0 )(y 0 ≠±3)为圆C 2 外一点,过P作圆C 2 的两条切线,分别与曲线C 1 相交于点A,B和C,D,证明:当P在直线x=-4上运动时,四点A,B,C,D的...
【简答题】在直角坐标系xOy中,曲线C 1 的点均在C 2 :(x-5) 2 +y 2 =9外,且对C 1 上任意一点M,M到直线x=﹣2的距离等于该点与圆C 2 上点的距离的最小值. (Ⅰ)求曲线C 1 的方程; (1-4班做)(Ⅱ)设P(x 0 ,y 0 )(y 0 ≠±3)为圆C 2 外一点,过P作圆C 2 的两条切线,分别与曲线C 1 相交于点A,B和C,D.证明:当P在直线x=﹣4上运动时,四点A...
【单选题】设一动点P到直线x=3的距离与它到点A(1,0)的距离之比为 3 3 ,则动点P的轨迹方程是(  )
A.
x 2 3 + y 2 2 =1
B.
x 2 3 - y 2 2 =1
C.
(x-4 ) 2 3 - y 2 6 =1
D.
x 2 2 + y 2 3 =1
【单选题】The words "about" or "approximately" used in connection with the amount of the credit or the quantity or the unit price stated in the credit are to be constructed as allowing a tolerance not to exceed...
A.
3%
B.
5%
C.
7%
D.
10%
【简答题】What role do frames play in the way they are constructed so that bargainers define problems and courses of action jointly through their talk?
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