辛亥革命是在胜利的欢呼声中失败的。这里的“胜利”是指（） A．改变了中国的社会性

是否存在同时满足下列条件的抛物线？若存在，求出它的方程；若不存在，请说明理由．

（1）准线是y轴；

（2）顶点在x轴上；

（3）点A（3，0）到此抛物线上动点P的距离最小值是2．

选词填空。

1. French food like bread and cakes is famous around the world, and __________ (other, the other)

    French products are also popular.

2. EuroDisney is only an hour __________ (far, away) from the centre of Paris.

3. Let's __________ (hang, put) the blanket on the floor.

4. Don't switch __________ (off, on) the fan. It's not hot in the room at all.

5. Look! The kind policewoman is taking a blind man __________ (across, through) the street.

6. The pizza __________ (tastes, is tasted) horrible.

7. When the alarm clock went __________(out, off), Judy was dreaming about flying.

What he has done is really  _____ . Now his parents' are _____ him .[ ]

A. disappointing; disappointed at           

B. disappointed; disappointed about

C. disappointed; disappointing by          

D. disappointing; disappointed with

某计算机公司销售计算机，在门口广告牌上写明：“凡在本处购买计算机者，给付总价款30%的回扣，介绍推销者给付总价款19%的佣金”。被人发现后举报到有关部门，经调查发现该公司给付的回扣、佣金，账面上均有明确记载。该公司给付回扣的行为是______。

A．不正当竞争行为

B．变相行贿行为

C．正当的促销交易行为

D．降价排挤行为