2021-2022 英语周报 高考 课标 3答案

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

19.解:(1)根据图中建立的空间直角坐标系,易知点D,N,M的坐标分别为D(0,0,0),N(2,1,0),M(1,2,3)3分(2)由空间两点间的距离公式,可得|MD|=√(1-0)2+(2-0)2+(3-0)AN|=√(1-2)2+(2-1)2+(3-0)2=√①1(6分(3)在xOy平面上,依题意可设点P的坐标为(2y,0),其中y∈[0,1]则MP|=√(2y-1)2+(y-2)2+(0-3)2y2-8y+14=/5(y5)+50<-<1,∴些,A时,线段MP取得最小值,为y30当y=0时,线段MP取得最大值,为√14,故MP的长度的范围为|30,14.(12分5

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