2022 英语周报 高三 HZ 32答案

【考范文】Dear fellow studentsWith the cold and flu season colliding (Rzi) with the COVID. 19 pandemic, how to protect ourselves ismailer of urgency. To combat the flu and other illnesses this season, all students had better do as followsThe single best way to prevent seasonal flu is to get vaccinated, but good health habits like avoidingpeople who are sick, covering your cough and washing your hands of ten can help stop the spread of germsadditionally, it's strongly advised to get enough sleep and reduce stress, which is also of great help.It's high time that we took preventive measures to ensure a sound body and a happy lifeStudent Union

18.【答案】D【解析】火箭靠喷出气体的反作用力提供推力,A项错误;火箭推动“天问一号”升空的过程,“天问一号”离地球距离变大,地球的引力变小,其重力逐渐减小,B项错误;卫星进入环火星圆轨道后处于完全失重状态,但仍受重力作用,此时的重力全部提供向心力,C项错误;由GmR(2)及="一,解得P浮,D项正确

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