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【题目】小林家的洗手台面上有一瓶洗手液(如图1),当手按住顶部A下压时(如图2),洗手液瞬间从喷口B流出,已知瓶子上部分的和的圆心分别为D,C,下部分的视图是矩形CGHD,GH=10cm,GC=8cm,点E到台面GH的距离为14cm,点B距台面GH的距离为16cm,且B,D,H三点共线.如果从喷口B流出的洗手液路线呈抛物线形,且该...
HDGC1257H-12P Place of Origin China Brand Original Packaging Bag-packed Description Rectangular Connector Housings D/C New or Contact MPQ 2000 Packaging and delivery Selling Units: Single item Single package size: 5X5X2 cm Single gross weight: ...
如图,GC交AB于点M,GH分别交AB,EF于点N,HD平分∠GHF,∠1+∠C=180°,∠2=∠3=60°,求证:CD∥EF.
品牌 CMO 1993 2 40 A AB K D R AT BU CA CB CT DC F FK FL GA GC GH GI GL GR GS HD LR MA MC MD ME MF ML MP M 保修期 12 电源电压 220V 工作电流 10A 工作电压 20000V 灵敏度 .0001 配件适用对象 GA GC GH GI GL GR GS HD LR MA 配套设备 MC MD ME MF ML MP ...
如图3-2,GC交AB于点M,GH分别交AB,EF于点N,H,HD平分∠GHF,∠1+∠C=180°,且∠2=∠3=60°,求证: CD∥EFGABNEH图3-2
解:∵∠1=∠CMN(对顶角相等)∠1+∠C=180° ∴∠CMN+∠C=180°(等量代换)∴AB∥CD(同旁内角互补,两直线平行)∵HD平分∠GHD ∴∠GHF=2∠3=120° ∴∠EHG=180°-120°=60° ∴∠2=∠EHG=60° ∴AB∥EF(同位角相等,两直线平行)又∵AB∥CD ∴CD∥EF ...
如图甲所示,由同一金属材料制成的硬质金属线框,其中abgh正方形线框无右边,cdef是正方形线框,各边长度为L,hd、gc用导线相连(导线电阻不计),线框abgh放置在垂直纸面向里的磁场中,金属框平面与磁场方向垂直。磁感应强度B随时间t均匀增加,变化规律为,下列说法正确的是A. d点电势比c点电势高 B. c点电势比d...
12O.如图,GC交AB于点M,GH分别交AB,CD,EF于点N,Q,H,HD平分∠GHF,∠1+∠C=180°,∠2=∠3=60°.求证:CD∥EF.G1A2BMNCD3EFH 220.如图,GC交AB于点M,GH分别交AB,CD,EF于点N,Q,H,HD平分∠GHF∠1+∠C=180°,∠2=∠3=60°求证: CD∥EFG1A2BMNCDEFH 320.如图,GC交AB于点M,GH分...