网址：http://m.1010jiajiao.com/timu3_id_716489[举报]
增加：在此处加一个漏字符号(∧)，并在其下面写出修改的词。
删除：把多余的词用斜线(＼)划掉。
修改：在错的词下划一横线，并在其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（从十一处起）不计分。
Dear sir,
I'm glad to recommend (推荐) my friend Li Ming to you. Li Ming was born in July 15, 1974 in Beijing. He graduated from Xisi Primary School in 1986 .When he was in the middle school, he did good in maths, physics and chemistry and fond of art. After graduating from No. 4 High School, he entered Beijing University study physics. After four year of hard work there, he went to the United States for further study. Because of his excellent work, he get a doctor's degree in physics in last year. He is now in good health but would like to make contributions to our country．I will be most gratefully if you consider my recommendation．
Looking forward to receive your early reply!
Yours truly,
Wang Lin 查看习题详情和答案>>
增加：在此处加一个漏字符号(∧)，并在其下面写出修改的词。
删除：把多余的词用斜线(＼)划掉。
修改：在错的词下划一横线，并在其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（从十一处起）不计分。
Dear sir,
I'm glad to recommend (推荐) my friend Li Ming to you. Li Ming was born in July 15, 1974 in Beijing. He graduated from Xisi Primary School in 1986 .When he was in the middle school, he did good in maths, physics and chemistry and fond of art. After graduating from No. 4 High School, he entered Beijing University study physics. After four year of hard work there, he went to the United States for further study. Because of his excellent work, he get a doctor's degree in physics in last year. He is now in good health but would like to make contributions to our country．I will be most gratefully if you consider my recommendation．
Looking forward to receive your early reply!
Yours truly,
Wang Lin 查看习题详情和答案>>
情境观察将矩形ABCD纸片沿对角线AC剪开，得到△ABC和△A′C′D，如图1所示．将△A′C′D的顶点A′与点A重合，并绕点A按逆时针方向旋转，使点D、A（A′）、B在同一条直线上，如图2所示．
观察图2可知：与BC相等的线段是 _________ ，∠CAC′= _________ °．
问题探究
如图3，△ABC中，AG⊥BC于点G，以A为直角顶点，分别以AB、AC为直角边，向△ABC外作等腰Rt△ABE和等腰Rt△ACF，过点E、F作射线GA的垂线，垂足分别为P、Q．试探究EP与FQ之间的数量关系，并证明你的结论．
拓展延伸
如图4，△ABC中，AG⊥BC于点G，分别以AB、AC为一边向△ABC外作矩形ABME和矩形ACNF，射线GA交EF于点H．若AB=kAE，AC=kAF，试探究HE与HF之间的数量关系，并说明理由．
情境观察将矩形ABCD纸片沿对角线AC剪开，得到△ABC和△A′C′D，如图1所示．将△A′C′D的顶点A′与点A重合，并绕点A按逆时针方向旋转，使点D、A（A′）、B在同一条直线上，如图2所示．
观察图2可知：与BC相等的线段是 _________ ，∠CAC′= _________ °．
问题探究
如图3，△ABC中，AG⊥BC于点G，以A为直角顶点，分别以AB、AC为直角边，向△ABC外作等腰Rt△ABE和等腰Rt△ACF，过点E、F作射线GA的垂线，垂足分别为P、Q．试探究EP与FQ之间的数量关系，并证明你的结论．
拓展延伸
如图4，△ABC中，AG⊥BC于点G，分别以AB、AC为一边向△ABC外作矩形ABME和矩形ACNF，射线GA交EF于点H．若AB=kAE，AC=kAF，试探究HE与HF之间的数量关系，并说明理由．
查看习题详情和答案>>
情境观察
将矩形ABCD纸片沿对角线AC剪开，得到△ABC和△A′C′D，如图1所示.将△A′C′D的顶点A′与点A重合，并绕点A按逆时针方向旋转，使点D、A(A′)、B在同一条直线上，如图2所示．
观察图2可知：与BC相等的线段是 ，∠CAC′= °．
问题探究
如图3，△ABC中，AG⊥BC于点G，以A为直角顶点，分别以AB、AC为直角边，向△ABC外作等腰Rt△ABE和等腰Rt△ACF，过点E、F作射线GA的垂线，垂足分别为P、Q. 试探究EP与FQ之间的数量关系，并证明你的结论.
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拓展延伸
如图4，△ABC中，AG⊥BC于点G，分别以AB、AC为一边向△ABC外作矩形ABME和矩形ACNF，射线GA交EF于点H. 若AB= k AE，AC= k AF，试探究HE与HF之间的数量关系，并说明理由.
查看习题详情和答案>>