2022届高三英语周报答案

36 have puzzled/ have been puzzling 37. which 38. height40. weighing41. known42. currently43. the44. locationsn? 45. were transported

7.A解答:椭圆4x2+y2=64可变形为x+=1,16642=64,c2=64-16=48,焦点为(0,4),(0,-4),离心率e则双曲线的焦点在y轴上,c=4,e从而a′=6,b2=12故所求双曲线的方程为y2-3x3=36

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