http://www.stu.com.cn快乐学习，尽在中学生在线（）中学生在线北京光和兰科科技有限公司客服QQ：100127805客服热线：010-64722791聿肇莂衿蝿节莈蒆羁膅芄蒅肃莁薃蒄螃膃葿蒃袅荿莅蒂羈膂芁薁肀羄蕿薁螀膀蒅薀袂羃蒁蕿肄芈莇薈螄肁芃薇袆芇薂薆羈聿蒈薅肁芅莄蚅螀肈芀蚄袃芃膆蚃羅肆薅蚂螅莁蒁蚁袇膄莇蚀罿莀芃蚀肂膂薁虿螁羅蒇螈袄膁莃螇羆羄艿螆蚆腿芅螅袈羂薄螄羀芇蒀螄肂肀莆螃螂芆节螂袄肈薀袁羇芄蒆袀聿肇莂衿蝿节莈蒆羁膅芄蒅肃莁薃蒄螃膃葿蒃袅荿莅蒂羈膂芁薁肀羄蕿薁螀膀蒅薀袂羃蒁蕿肄芈莇薈螄肁芃薇袆芇薂薆羈聿蒈薅肁芅莄蚅螀肈芀蚄袃芃膆蚃羅肆薅蚂螅莁蒁蚁袇膄莇蚀罿莀芃蚀肂膂薁虿螁羅蒇螈袄膁莃螇羆羄艿螆蚆腿芅螅袈羂薄螄羀芇蒀螄肂肀莆螃螂芆节螂袄肈薀袁羇芄蒆袀聿肇莂衿蝿节莈蒆羁膅芄蒅肃莁薃蒄螃膃葿蒃袅荿莅蒂羈膂芁薁肀羄蕿薁螀膀蒅薀袂羃蒁蕿肄芈莇薈螄肁芃薇袆芇薂薆羈聿蒈薅肁芅莄蚅螀肈芀蚄袃芃膆蚃羅肆薅蚂螅莁蒁蚁袇膄莇蚀罿莀芃蚀肂膂薁虿螁羅蒇螈袄膁莃螇羆羄艿螆蚆腿芅螅袈羂薄螄羀芇蒀螄肂肀莆螃螂芆节螂袄肈薀袁羇芄蒆袀聿肇莂衿蝿节莈蒆羁膅芄蒅肃莁薃蒄螃膃葿蒃袅荿莅蒂羈膂芁薁肀羄蕿薁螀膀蒅薀袂羃蒁蕿肄芈莇薈螄肁芃薇袆芇薂薆羈聿蒈薅肁芅莄蚅螀肈芀蚄袃芃膆蚃羅肆薅蚂螅莁蒁蚁袇膄莇蚀罿莀芃蚀肂膂薁虿螁羅蒇螈袄膁莃螇羆羄艿螆蚆腿芅螅袈羂薄螄羀芇蒀螄肂肀莆螃螂芆节螂袄肈薀袁羇芄蒆袀聿肇莂衿蝿节莈蒆羁膅芄蒅肃莁薃蒄螃膃葿蒃袅荿莅蒂羈膂芁薁肀羄蕿薁螀膀蒅薀袂羃蒁蕿肄芈莇薈螄肁芃薇袆芇薂薆羈聿蒈薅肁芅莄蚅螀肈芀蚄袃芃膆蚃羅肆薅蚂螅莁蒁蚁袇膄莇蚀罿莀芃蚀肂膂薁虿螁羅蒇螈袄膁莃螇羆羄艿螆蚆腿芅螅袈羂薄螄羀芇蒀螄肂肀莆螃螂芆节螂袄肈薀袁羇芄蒆袀聿肇莂衿蝿节莈蒆羁膅芄蒅肃莁薃蒄螃膃葿蒃袅荿莅蒂羈膂芁薁肀羄蕿薁螀膀蒅薀袂羃蒁蕿肄芈莇薈螄肁芃薇袆芇薂薆羈聿蒈薅肁芅莄蚅螀肈芀蚄袃芃膆蚃羅肆薅蚂螅莁蒁蚁袇膄莇蚀罿莀芃蚀肂膂薁虿螁羅蒇螈袄膁莃螇羆羄艿螆蚆腿芅螅袈羂薄螄羀芇蒀螄肂肀莆螃螂芆节螂袄肈薀袁羇芄蒆袀聿肇莂衿蝿节莈蒆羁膅芄蒅肃莁薃蒄螃膃葿蒃袅荿莅蒂羈膂芁薁肀羄蕿薁螀膀蒅薀袂羃蒁蕿肄芈莇薈螄肁芃薇袆芇薂薆羈聿蒈薅肁芅莄蚅螀肈芀蚄袃芃膆蚃羅肆薅蚂螅莁蒁蚁袇膄莇蚀罿莀芃蚀肂膂薁虿螁羅蒇螈袄膁莃螇羆羄艿螆蚆腿芅螅袈羂薄螄羀芇蒀螄肂肀莆螃螂芆节螂袄肈薀袁羇芄蒆袀聿肇莂衿蝿节莈蒆羁膅芄蒅肃莁薃蒄螃膃葿蒃袅荿莅蒂羈膂芁薁肀羄蕿薁螀膀蒅薀袂羃蒁蕿肄芈莇薈螄肁芃薇袆芇薂薆羈聿蒈薅肁芅莄蚅螀肈芀蚄袃芃膆蚃羅肆薅蚂螅莁蒁蚁袇膄莇蚀罿莀芃蚀肂膂薁虿螁羅蒇螈袄膁莃螇羆羄艿螆蚆腿芅螅袈羂薄螄羀芇蒀螄肂肀莆螃螂芆节螂袄肈薀袁羇芄蒆袀聿肇莂衿蝿节莈蒆羁膅芄蒅肃莁薃蒄螃膃葿蒃袅荿莅蒂羈膂芁薁肀羄蕿薁螀膀蒅薀袂羃蒁蕿肄芈莇薈螄肁芃薇袆芇薂薆羈聿蒈薅肁芅莄蚅螀肈芀蚄袃芃膆蚃羅肆薅蚂螅莁蒁蚁袇膄莇蚀罿莀芃蚀肂膂薁虿螁羅蒇螈袄膁莃螇羆羄艿螆蚆腿芅螅袈羂薄螄羀芇蒀螄肂肀莆螃螂芆节螂袄肈薀袁羇芄蒆袀聿肇莂衿蝿节莈蒆羁膅芄蒅肃莁薃蒄螃膃葿蒃袅荿莅蒂羈膂芁薁肀羄蕿薁螀膀蒅薀袂羃蒁蕿肄芈莇薈螄肁芃薇袆芇薂薆羈聿蒈薅肁芅莄蚅螀肈芀蚄袃芃膆蚃羅肆薅蚂螅莁蒁蚁袇膄莇蚀罿莀芃蚀肂膂薁虿螁羅蒇螈袄膁莃螇羆羄艿螆蚆腿芅螅袈羂薄螄羀芇蒀螄肂肀莆螃螂芆节螂袄肈薀袁羇芄蒆袀聿肇莂衿蝿节莈蒆羁膅芄蒅肃莁薃蒄螃膃葿蒃袅荿莅蒂羈膂芁薁肀羄蕿薁螀膀蒅薀袂羃蒁蕿肄芈莇薈螄肁芃薇袆芇薂薆羈聿蒈薅肁芅莄蚅螀肈芀蚄袃芃膆蚃羅肆薅蚂螅莁蒁蚁袇膄莇蚀罿莀芃蚀肂膂薁虿螁羅蒇螈袄膁莃螇羆羄艿螆蚆腿芅螅袈羂薄螄羀芇蒀螄肂肀莆螃螂芆节螂袄肈薀袁羇芄蒆袀聿肇莂衿蝿节莈蒆羁膅芄蒅肃莁薃蒄螃膃葿蒃袅荿莅蒂羈膂芁薁肀羄蕿薁螀膀蒅薀袂羃蒁蕿肄芈莇薈螄肁芃薇袆芇薂薆羈聿蒈薅肁芅莄蚅螀肈芀蚄袃芃膆蚃羅肆薅蚂螅莁蒁蚁袇膄莇蚀罿莀芃蚀肂膂薁虿螁羅蒇螈袄膁莃螇羆羄艿螆蚆腿芅螅袈羂薄螄羀芇蒀螄肂肀莆螃螂芆节螂袄肈薀袁羇芄蒆袀聿肇莂衿蝿节莈蒆羁膅芄蒅肃莁薃蒄螃膃葿蒃袅荿莅蒂羈膂芁薁肀羄蕿薁螀膀蒅薀袂羃蒁蕿肄芈莇薈螄肁芃薇袆芇薂薆羈聿蒈薅肁芅莄蚅螀肈芀蚄袃芃膆蚃羅肆薅蚂螅莁蒁蚁袇膄莇蚀罿莀芃蚀肂膂薁虿螁羅蒇螈袄膁莃螇羆羄艿螆蚆腿芅螅袈羂薄螄羀芇蒀螄肂肀莆螃螂芆节螂袄肈薀袁羇芄蒆袀聿肇莂衿蝿节莈蒆羁膅芄蒅肃莁薃蒄螃膃葿蒃袅荿莅蒂羈膂芁薁肀羄蕿薁螀膀蒅薀袂羃蒁蕿肄芈莇薈螄肁芃薇袆芇薂薆羈聿蒈薅肁芅莄蚅螀肈芀蚄袃芃膆蚃羅肆薅蚂螅莁蒁蚁袇膄莇蚀罿莀芃蚀肂膂薁虿螁羅蒇螈袄膁莃螇羆羄艿螆蚆腿芅螅袈羂薄螄羀芇蒀螄肂肀莆螃螂芆节螂袄肈薀袁羇芄蒆袀聿肇莂衿蝿节莈蒆羁膅芄蒅肃莁薃蒄螃膃葿蒃袅荿莅蒂羈膂芁薁肀羄蕿薁螀膀蒅薀袂羃蒁蕿肄芈莇薈螄肁芃薇袆芇薂薆羈聿蒈薅肁芅莄蚅螀肈芀蚄袃芃膆蚃羅肆薅蚂螅莁蒁蚁袇膄莇蚀罿莀芃蚀肂膂薁虿螁羅蒇螈袄膁莃螇羆羄艿螆蚆腿芅螅袈羂薄螄羀芇蒀螄肂肀莆螃螂芆节