A:若a=b,则a2=b2
B:全等三角形的周长相等
C:若a=0,则ab=0
D:有两边相等的三角形是等腰
Mr. White lives in the countryside with his wife, Mrs. White. From Monday to Friday he works in a small office near his house. He is free on Saturdays and Sundays. He has a nice garden near his house. He likes growing flowers and he usually works in the garden on Saturdays and Sundays. The flowers are colourful and beautiful. Mrs. White likes them very much. She often helps Mr. White. They live happily together.
当今时代,文化越来越成为民族凝聚力和创造力的重要源泉,越来越成为经济社会发展的重要支撑,越来越成为综合国力竞争的重要因素。民族精神在增强我国国际竞争力中的作用表现在( )
①凝聚和动员民族力量,展示民族形象
②有利于搞好经济建设,促进经济发展,增强综合国力
③弘扬和培育民族精神是当前国际竞争的实质
④民族精神是综合国力的基础,是综合国力的重要因素
古诗是中华文化的瑰宝。
《凉州词》中的“____ ,____ ”表达了边疆将士思念家乡的愁绪;
《浪淘沙》中的“____ ,____ ”表达了诗人对美好生活的向往。
《十五从军征》中的“____ ,____ ”让我感受到了战争的残酷、时间之长。“但使龙城飞将在,不教胡马度阴山”表达了诗人____ 的感情。
英国人安德鲁·翰德森说:“中国的禁烟运动给了我们一个战争机会,可以使我们乘战胜之余威,提出我们的条件。”对这句话最准确的理解是( )