单击此处编辑母版文本样式新课标高考总复习 北师大版 · 英语单击此处编辑母版文本样式Apple founder Steve Jobs dies aged 56Apple Inc co-founder and former CEO Steve Jobscounted among the greatest American CEOs of his generationdied on Wednesday
单击此处编辑母版文本样式新课标高考总复习 北师大版 · 英语单击此处编辑母版文本样式The school bus accident of GansuThe death(死亡人数)in a school bus accident that occurred on Wednesday morning in the northwest province of Gansu has risen to 20
单击此处编辑母版文本样式新课标高考总复习 北师大版 · 英语单击此处编辑母版文本样式Chinamemorates centenary of end to imperial ruleBEIJINGOct.9(Xinhua)—China held a grand ceremony tomemorate the centennial anniversary of the 1911 Rev
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单击此处编辑母版文本样式新课标高考总复习 北师大版 · 英语单击此处编辑母版文本样式Death of Osama bin Laden and the end of the Iraq WarOn December 18the US military officially ended its war in Iraq nearly nine years after the invasion that o
英语 人教版 Book 2 Unit 2 The Olympic Games晨记有道 晨记有道考点对接基础巩固take an active part in participate join stand for on behalf of regular regular customers admit admit to as well 音频助记晨记有道 replace re
beg 11.____________n.产品出品 12.____________n.传真13.____________n.衣服 14.____________vt.评论评价15.____________vt.打搅使烦恼 16.____________adj.粗鲁的无礼的17.____________vt.﹠n. 交易讨价还价18.___
(9)It was evening when we got home. It was evening in which we got home.(10) It was five years before they finally graduated from Beijing University. 过了5年他们才从北大毕业(11) It wont be long before we grad
单击此处编辑母版文本样式《走向高考》 高考总复习 · 数学( 配北师大 版 )第八章 立体几何初步首页上页下页末页考纲解读1.能用向量语言表述直线与直线直线与平面平面与平面的垂直平行关系.2.能用向量方法证明有关直线和平面位置关系的一些定理(包括三垂线定理).3.能用向量方法解决直线与平面平面与平面的夹角的计算问题了解向量方法在研究几何中的作用.考向预测1.空间向量的数量积及其坐标运算是高考
两点在平面内[解析] 本题考查线线角考查学生的作图能力和计算能力.∵P∈直线ABP∈平面ABC.又直线AB∩平面αP∴P∈平面α.∴P是平面ABC与平面α的公共点.∵平面ABC∩平面αl∴P∈l.同理Q∈lR∈l.∴点PQR在同一条直线l上.[点评] 易忽视先找出平面ABC与平面α的交线从而缩小目标范围.[解析] 由已知知E是CD的中点分析:三棱柱中AA1∥CC1故∠A1AB即所求.由A1在底面射
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