❶ (2014石景山區一模)如圖,⊙O是△ABC的外接圓,AB=AC,連結CO並延長交⊙O的切線AP於點P.(1)求證:
解答:(1)證明:連結AO並延長交BC於D、
❷ 2016年石景山英語初三一模c篇閱讀譯文 II. 31. B 32. D 33. A 34. B 35. C 36. A 37. C 38. B 39. C 40. D 41. B 42. D 43. C 44. D 45. A 46. B 47. A 48. B 49. A 50. C III. 51. G 52. H 53. I 54. F 55. D 56. E 57. B 58. C IV. 59. third 60. careful 61. building 62. themselves 63. mainly 64. natural 65. truth 66. scientistV. 67. doesn't have 68. How soon 69. didn't he 70. be done 71. anymore/longer 72. if/whether had 73. Instead ofVI. 74. D 75. C 76. B 77. A 78. D 79. A 80. B 81. D 82. C 83. B 84. A 85. C86. walked 87. almost 88. stupid 89. nothing 90. side/small 91. luck 92. pleased93. Because he lost his memory. / To ask for help.94. They felt surprised.95. He could make sentences without difficulty.96. A friend of his.97. In a perfect flat in downtown Manhattan.98. He had to meet his family and friends. /He had to continue his four - year course in photography. (Any reasonable answer is acceptable. )我是常年教初三的英語老師,有什麼問題可以和我長期保持聯系,我會盡力解答你的問題。 ❸ 2014年北京市石景山區初三一模成績為463分,中考是基本上能考上哪些學校 你可以看<招生簡章》啊。我是今年朝陽的考生,今天報志願時就是根據招生簡章走的。你可以上網上查一查往年的分數線,加油吧。石景山的九中,京源,石景山實驗,佳匯,景山遠洋分校不錯哦 ❹ (2014石景山區一模)圖甲為一款有高溫、低溫兩檔的家用蒸汽電熨斗,其工作原理電路如圖乙所示,其中R1 (1)由公式P=
電熨斗在低溫檔正常工作10s,電流所做的功: W=P低t=1100W×10s=11000J;內 (2)從表中可知:容P高=1980W,P低=1100W, 則R2的功率為P2=P高-P低=1980W-1100W=880W, 故R2=
(3)電熨斗的實際功率:P實=
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