2010年上海世博会中国馆一“东方之冠”给人强烈的视觉冲击，它的主体结构大量使用钢材，其中钢与下列哪种物质属同类材料(  )

计算：${\left(\sqrt{3}-\sqrt{2}\right)}^{2009}$${\left(\sqrt{3}+\sqrt{2}\right)}^{2010}$＝ ____．

阅读理解A
    I'm Linda．I can't find my keys．I lost them this morning．There is a Lost and Found box in our classroom．My keys may (可能)be in the box．
    Oh, there are many things in the box．This is a pencil box．What color is it? It's yellow．That is a white eraser．And what's that? It is a watch．A picture of a CD is on it．It's Sara's．Wow! I find my keys．One is to my classroom，and the other (另一个)is to my house．That green cup is Jack's．This baseball is his，too．I will(将)ask him to take his things．Three rulers, two pencils and two nice pens are also in the box．Whose are they? I don't know．
根据材料内容判断正误。

刘超是个聪明的学生，可他在学习上不肯用功，老师提醒他应该更努力些，他却说：“我现在如果太刻苦了，将来不就没有‘潜能’可供挖掘了吗？”他的说法（   ）

六年级同学今天参加数学考试，8点整开始，120分钟后结束．请你算一算，几点考试结束：（  ）