阅读下面短文，在空白处填入一个适当的词，或填入括号中所给单词的正确形式。

    Li Daiyu and her cousin Liu Qian were on a trip to Canada to visit their cousins on the Atlantic coast. Rather than take the plane all the way, they ____（plan）to fly to Vancouver and then take the train from west to east across Canada. The thought that they could cross the whole continent was ____(excite).

    Canada is the second biggest country in the world. People say Vancouver is Canada's most beautiful city ____(surround)by mountains and the Pacific Ocean. On the coast north of Vancouver, it is so wet there that the trees are extremely tall.

    That afternoon aboard the train, the cousins settled down in their ____(seat). Their next stop was Calgary,____ is famous for the Calgary Stampede. They know that cowboys come from all over the world ____(compete)in the Stampede. Many cowboys have a gift ____ riding wild horses. They also learned that most Canadians live within a few hundred kilometers of the USA border and that Canada's population is only ____(slight)over thirty million, but now they ____(amaze)to see such an empty country. Then they arrived in ____urban area, the busy port city of Thunder Bay at the top of the Great Lakes.

已知椭圆C： $\frac{x^2}{a^2}$ + $\frac{y^2}{b^2}$ =1（a＞0，b＞0）的离心率为 $\frac{\sqrt{2}}{2}$ ，右焦点为F，上顶点为A，且△AOF的面积为 $\frac{1}{2}$ （O为坐标原点）．

如图，点D在△ABC的边AC上，要判定△ADB与△ABC相似，添加一个条件，不正确的是（   ）.

（12分）如图，在直角坐标系中，已知点A（0，2），点B（-2，0），过点B和线段OA的中点C作直线BC，以线段BC为边向上作正方形BCDE．

（1）填空：点D的坐标为         ，点E的坐标为          ；
（2）若抛物线y=aa²+ba+c（a≠0）经过A，D，E三点，求该抛物线的解析式；
（3）若正方形和抛物线均以每秒个单位长度的速度沿射线BC同时向上平移，直至正方形的顶点E落在y轴上时，正方形和抛物线均停止运动．
① 在运动过程中，设正方形落在y轴右侧部分的面积为s，求s关于平移时间t（秒）的函数关系式，并写出相应自变量t的取值范围；
② 运动停止时，请直接写出此时的抛物线的顶点坐标．

下列各句中没有错别字的一项是(    )