2022英语周报第50期。答案

C【解析】由题b=1,又c2=a2 b2,解得a=2,c=5,所以双曲线方程则A0),B(2,0),设P(),则yopATry 2又双曲线的渐近线为y=主2x,P为双曲线右支上异于点B的点所以<0,或02 T故。<-1或>1,直线PA与PB的斜率之和的取值范圈为(-∞,-1)(1, ∞).

第二节this time, Lewis was so distracted by the UFO.That's when the object entered the last cloud. From thereit was nothing but open sky. "When it appeared, my lifechanged, "Lewis says. "There against the richness of theblue sky was a silvery shape that seemed to have arms andlegs! It was so beautiful to look at. At the same time, ithad the appearance of metal. It looked like some kind ofship with a strange design. The best way I could describe itis that it looked like a silver tool in the design of thestickman children draw. It was huge, moving fasst anmade no noise.As it sailed overhead, some of the arms and legsould move up and down, giving the impression of beingalive!"He says. "It made a couple of rolls, reflecting thesun in every direction just beautiful! Slowly it landed onthe land. I imagined extraterrestrials would come out, butthat didn't happen. Then it began to rise and move fartherand farther away. As it started to fade away from myview, I found myself short of breath and with tearsrunning down my cheeks. It had that much of an effect onme. I began thinking maybe that's what an angel lookslike

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