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- 1如图,在△ABC中,D是BC中点,EF‖BC,交AB于点E,交AC于点F,交AD于点G.求证EG=GF
- 2小明的圆锥形玩具的高为12cm,母线长为13cm,则其侧面积是_cm2.
- 3100平方米等于多少亩?
- 4The students are going to have fun learning andspeaking English this tern.
- 5若x>0,y>0,且x+√xy-2y=0,则代数式(2x-3y)(3x+2y)(x^3-y^3)-1的立方根是
- 6当X∈【π/6,7π/6】时,求函数Y=3-sinX-2cos^2X的最小值和最大值
- 72013年4月20号,四川省雅安发生了7.0级地震,为了抢救伤员,一架救援直升机从芦山县某镇A地起飞,
- 8【高中化学题】实验室里需要480毫升0.1摩尔每升的硫酸铜溶液,现选用500毫升容量瓶.需要多少胆矾进行配置?
- 9It was not until recently ________ we learned the famous film star would marry that politician.a.
- 10在雷雨天,人们总是先看见闪电,然后才听到雷声.设看见闪电和听到雷声的时间间隔为△t,声速为v光速为c.