题目

（08年龙岩一中冲刺文）在正三棱锥中，、分别是、的中点，与所成的角是，且，则正三棱锥的外接球的表面积为（       ）A．       B．       C．       D．      p{font-size:10.5pt;line-height:150%;margin:0;padding:0;}td{font-size:10.5pt;} 答案：答案：Cp{font-size:10.5pt;text-align:left;line-height:150%;margin:0;padding:0;}td{font-size:10.5pt;text-align:left;}7．短文改错    假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文．文中共有10处语言错误，每句中最多有两处．错误仅涉及一个单词的增加、删除或修改．增加：在缺词处加一个漏字符号（^），并在其下面写出该加的词．删除：把多余的词用（\）划掉．修改：在错的词下画一横线，并在该词下面写出修改后的词．注意：1．每处错误及其修改均仅限一词；2．只允许修改10处，多者（从第11处起）不计分．I have learnt so much things from my parents．They show me when to be a tolerant（宽容）person．When children make mistakes，most parents who are hard with their kids will be very angry．They say some hurting words，making their children to feel sad．Besides，my parents are different from them．Every time I make mistakes，my parents prefer to educate me in a gently way．I'm so grateful to my parents all that they have done．Being tolerant of other people's mistakes are the best way to solve problems．Your kind act will be greatly appreciating．Be tolerant of other so that they will be tolerant in turn．