2022英语周报九年级新目标15答案

写作Ladies and gentlemenTo begin with, please allow me to express my warm welcome on behalf of ourschool.【要点一,表达欢迎】 Aiming to enhance our mutual understanding andexperience different cultures, various activities wil! be arranged【高分句型现在分词作状语】. As planned, we will hold a talent show where everyone canshow their outstanding performances【高分句型二, where引导定语从句】Classes on traditional Chinese culture are also scheduled, such as paper-cutting,Chinese opera, calligraphy,etc, followed by a gifts exchangingactivity. Additionally, you're invited to pay a visit to surrounding scenicspots.【要点二,介绍活动安排】Finally, I sincerely hope that you can enjoy yourself and wish you a pleasantjourney.【要点三,表达愿望】

(1)对结点O,作出力图如图,BBTAm19由平衡条件有cosb=19nb=B19解得:A=4m193TR=Tm,g(2)对于乙物体受力分析如图F外x29乙摩擦力F=T-“19方向水平向左(3)当乙物体刚要滑动时,对结点处受力分析如图BmaxFTAmax, mimax g静摩擦力达到最大值Fma=m29③TB=Fma④T由234得:mm,=mb=16k

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