2022届100所名校高考模拟金典卷语文 答案

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14.(1)因为共1<2,所以PQ起下滑对PQ应用作顿第定律可知P、Q沿斜面下滑的加速度a= gsin 6-1gcos61分)应用速度公式可知经过时间t,P、Q的速度为r=at(1分)又P=F,可知重力对P做功的功半为P=(2 nisin b)r(2分)解得P=1(1分)(2)在时间内P运动位移x=1m(1分)对Q,应川牛顿第二定律有 mrsin6-f=ma(2分)摩擦力对Q做功为W=-fx解得W=-mgr(1分)

mask my weariness, and requested him the same thinUnexpectedly, he took out his mobile phone for me withouthesitation or any probing questions. Dancing in his eyeswas the real kindness that I had been struggling to seek forso long. From that day on, I began helping other strangersin distress, just like the poor-looking but kind man, withthe aim of passing kindness and melting the ice in manypeople’ s hearts第三节One possible versionParagraph 1At that point I saw a young mother with her ttto kids. Ithought that a beautiful woman with charming blue eyesmust be willing to help me. So, with great expectation, Itrotted briskly towards her with an appropriate smile on myface,and requested courteously if she could be kind enoughto make a phone call for me. However, what I saw was awoman's face disfigured by frowns and what I heard was a.sound of dismay and suspicion under her breath. Without aword, she pulled her kids to escape from me, as if scareda murderer. I stood there, motionless, with a blank faceand a sinnking heartParagraph 2Finally a man tearing a cheap T-shirt and dirty jeaneseemed to notice me. I squeezed a smile though it failed to