英语周报高二2022_2022答案

Paragraph 1Several days later, when Jenny's father came in toread her a story, Jenny was waiting anxiously for him on thebed. When listening to the story Jenny was totally absentminded, with her hands holding the necklace tightly andfirmly. When the story came to an end, unexpectedlyJenny offered her beloved necklace to her father, with herfingers trembling automatically. No one knew what thenecklace meant to her. She whispered to her father, softlyand gently, "Daddy, you know I love you more than thenecklace. "Then the necklace slid into her father's handsdeterminedlyParagraph 2Holding the plastic pearl his daughter offered, thefather dragged out a blue box. Much to Jennys amazement, a beautiful real pearl necklace lay peacefully in thebox, which set her heart racing. Jenny froze there,athrilled expression twisting her face. Before Jenny was ableto say something, her father brushed a warm kiss on herface and gathered her into his arms. Holding the genuinenecklace in her hand, Jenny lifted her lip, tears beginningto blur her vision

5.C【解析】在地球南、北两极时,物体受到的重力大小与万有引力大小相等,即cMm=mg,解得M=A项错误;由于在地球赤道上该物体的重力为mg,则有m一mg=mR,可解得a=√③g,故地球自转的周期T==2xB项错误;由于地球同步卫星绕地球转动的周期等于地球自转的周期,由万有引力定律可得一m(R+b,解得地球同步卫星距地面的高度为R(A8纸项正确;由于地球的第一字宙速度大小等于卫星绕地球转动的最大速度,则有R解得√,又因为CM=R,故√gR,D项错误

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