二氧化碳与水反应

DDC桩与其他技术的优点是什么? 为什么有人说三等分任意角用尺规画不出来呢?明明是可以画得出来的啊 能不能用尺规三等分任意角,为什么? 频率代表什么意思 如图 已知BE是∠ABC的平分线,CD是△ABC的外角∠ACF的平分线,它与BE的延长线交于点D,试证明∠A=2∠D 如图,已知BE是∠ABC的平分线,CD是△ABC的外角∠ACF的平分线,它与BE的延长线交于点D,证明∠A=2∠D. 如图,BD平分∠ABC,CD平分∠ACF已知∠A=40°,求角D的度数级 如图,已知BE为∠ABC的角平分线,CD为△ABC的外交∠ACF的平分线,它与BE的延长线交于D,试证明∠A=2∠D（注；图片是找的,原题没有角A=70°） 如图,已知AD是△ABC的角平分线,且BD=CD,DE⊥AB于E,CF⊥ED交ED延长线于F,试说明CD平分∠ACF的理由 求2.3.4. “但言是王右军书,还有“因书之”中的“书”是什么意思?“其书为世所重”中的“书”是什么意思? 第五题1.2两道就大神解决谢谢 因谓姥曰：“但言是王右军书,以求百钱邪.”中的谓怎么翻译? 王右军诈睡文言文的译文 英语翻译王右军与谢太傅共登冶城.谢悠然远想,有高世之志.王谓谢曰："夏禹勤王,手足胼胝；文王旰食,日不暇给.今四郊多垒,宜人人自效.而虚谈废务,浮文妨要,恐非当今所宜."谢答曰："秦任 DDC桩主要用于哪些地质? 用9根火柴棍围成4个同样大的三角形, 三根火柴棍怎么摆成四个三角形 就是8和7的积 8和7的和 如图,已知CD是△ABC中∠ACB的外角平分线,请说明∠BAC＞∠B. 如图,已知cd是△abc中＜acb的外角平分线,请说明＜bac大于＜b 已知抛物线y=-x05+9的图像与x轴交于A、B两点,与y轴交与点C,求△ABC的面积 怎么求极限这个极限怎么求? Which of the following is NOT characteristic of British government?A.It offers the Queen high political status and supreme power.B.It is both a parliamentary democracy and a constitutional monarchy.C.It is the oldest representative democracy in the w 专利技术DDC桩是干什么的? 1.Which of the following is NOT considered a characteristic of Britain?A.Economic differences between north and south.B.Differences of social systems between Scotland and Wales.C.Class differences between a white-collar worker and a blue-collar worke 瑞力通的专利技术DDC桩是干什么的? 10.Which of the following is NOT characteristic of the hereditary aristocracy in the UK?A.The noble title can be inherited by the children.B.They usually own historic houses in the countryC.They are the richest people in the UKD.The senior members ca ddc桩是谁的专利技术? DDC桩技术是哪个公司的专利技术? 瑞力通的专利技术DDC是干什么的? 【初二数学】已知△ABC的角平分线BD与外角平分线CD交于点D,求证:∠A=2∠D