2021-2022 英语周报 九年级 GZ 42答案

22.(1)C(2分)(2)ABC(2分)(3)D(2分)解析:(1)该实验采用了“等效法”,即用两个弹簧测力计拉橡皮筋的效果和用一个弹簧测力计拉橡皮筋的效果是相同的,即要求橡皮筋的形变量相同,选项C正确,A、B错误(2)实验时对两细绳的方向没有要求,因此不必要保持垂直,选项A错误;为了减小实验误差,应在细绳上用笔尖记录间距较远的两点来确定细绳的方向,选项B错误;两细线拉橡皮筋时,只要确保拉到同一点即可,不一定使橡皮筋在两【高三押题信息卷·理综(二)参考答案第4页(共6页)】唢D正铜3)由于O点的位置不变,则橡皮筋的长度保持不变,即橡皮筋的作用力不变,因此左右两侧弹簧测力计的合力大小保持不变,作图如图所示,可知左侧弹簧测力计的作用力一直增大,右侧弹簧测力计的作用力先减小后增大,选项A、B、C错误,D正确23(1)电路图见解析(2分)R(1分)(2)最大值(2分)(3)5n24Fr

第二节书闺表达Dear JohnIlow are you doing? I'm extrcmcly glad tonorm vouthat my class will leave for jingdezhen to experience theceramic culture next Sunday. Are you interested in thisctivity? Here are some details about itThe activity will last about 9 hours, from 8: 00 in themorning to a: 0he afternoon. during which time youcan get a visual impact from appreciating those preciousand delicate ceramics. At that time. ceramic masters willhowhow to makc ceramics with fantastic techniques. Toke ceramics in person must be the most exciting partAnd the works on our own can be taken away ifreferi really want to invite you to come with us. lookingforward to your reply. Pleasc contact me at any momentLiH

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