英语周报2019～2022高二答案

10.B.【解析】如图,圆M与△PF2F1内切于点T,N,A,则F1T=|F1A|,|F2N=|F2A|,PT|=PN|,设A(t,0),|PF1|-|PF2|=|TF1|-|NF2=|AF1|一AF2|=(c t)-(c-t)=2a,解得t=a,又|MNc-a=MA|,所以M(a,c-a),由MF1|>2|MOl,得√(a c)2 (c-a)2>2√a2 (-a)2,化简得c2 3a2-4ac<0,即g2-4e 3<0,解得1

第二节One possible versionSuddenly the leader of the boy Scouts stood up and saidMa'am, I think we can help you. He then spent five minutesrearranging his group so that the seats were available for the familyThe boys all followed his directions happily and the mother withthe three children was in relief. She expressed thanks to the boyScouts and the leader with tears in her eyesKallie, however, was beginning to panic at the thought of notbeing next to me. I told her that there wasn't anything I could doWe would have to sit where we were. Amazingly, the man sittingin front of me, turned around to me and asked,Would you andyour daughter like our seats?", referring to himself and his friendHe said he didn't like the window seat and would prefer the aisleWe changed seats and continued our trip, very glad to be togetherand enjoy the scenery from Kallie's window seat. Would that manhave offered us his seat if the Boy Scouts leader hadnt done sofor the mother and her children? I don't know. But I do know thatkindness can affect others

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