2022——2022学年英语周报第15期答案

22.解:(1)依题意,曲线C的参数方程为y=2√3sin(a为参数),所以E的参数方程为cosay=/3sim(a为参数),故E的普通方程为x2+y2=1曲线C2的极坐标方程为psin(+元)=22,即有p(2sin0+2cs6)=2√2由x=pcos,y=psin0,可得x+y-4=0即有C2的直角坐标方程为直线x+y-4=0;5分(2)设P(cosa,3sina),由P到直线的距离为dsina2si6当sin(a+6)=1时,PQ的最小值为√三,此时可取3,即有P(2,3)23.解:(1210分

B24.A。根据第二段中的 this is actually the first time my whole family has come back to AnimalPlanet together, so it s pretty unusua可知,与以往不同的是,这次他们全家都参与节目的拍摄。25.C。根据第三段中的 as the memories you have of Dad start to fade, you can always look back atthe old footage镜头) and relive those special moments可知,John认为等以后对父亲的记忆变模糊时,这些镜头可以让他重拾对父亲的记忆26.A。根据最后一段中的 John participates in Distance Education, a program similar tohomeschooling k But I've actually got a classroom that's set up at Australia Zoo and a teacherthat travels with us wherever we go可知。27.B。根据最后一段中John所说的“ Im learning as much as I can about all of the animals and allof the work at Australia Zoo. I feel really honored to be following in Dad's footsteps. I lovecontinuing that work.”可知,他希望将来能够继承父亲的事业。再根据第二段中的 Steveowned and ran the zoo before he died in2006.可知,John希望自己以后继续经营该动物园。

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