2022英语周报高一6期答案

0.AD【解析】在整个运动过程中,系统受到的合外力为零,系统的总动量守恒,小球a与小球b碰撞过程机械能减小,故A项正确,B项错误;小球a、b碰撞瞬间,弹簧仍处于原长,对小球c无影响,小球c的速度为零,C项错误;小球a与小球b碰撞后,弹簧被压缩弹簧对小球b产生向左的弹力,对小球c产生向右的弹力,小球a、b做减速运动,小球c做加速运动,当小球b、c速度相等时,弹簧压缩量最大,弹性势能最大,故D项正确。

第三节One possibleversionParagraph 1He was determined to protect the flowers. So he built ahigh wall around them. Not feeling satisfied, he even setup rules as to who could enter the garden, how they mustenter,and what they must follow while they were there.Asa result, children were forbidden to enter and appreciatethe flowers as before. For his part, he continued to see to itthat his treasure received enough sunlight and water so thatthe flowers continued to perform their wonderful magicParagraph 2Hethe flowers seemed to fade day by day,so theman went everywhere for help. He visited every expert, onlyto find his efforts in vain. He felt on pins and needles, see-ing his beloved flowers dying. One evening, he was wan-dering on the street aimlessly when he suddenly noticed theflower woman on the same spot where he had met her, giving away her amazing flowers. It finally dawned on him thatthe flowers are gifts not passessions and that only by sharingcan the magic remain and last

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