英语周报2022-2022学年七年级新目标第7期答案

第一节短文改错Last Sunday one of my legs was badlyhurt while Iplayed the basketball in a match. Had- been sent to hos-pital, I was informed that I had to stay in bed for onemonth. At that time, I was very worried about myschoolwork However, unexpectedly my classmate Tomhelp me almost every day. He not only told mewhat our teachers had taught in class, A helped me withmy homework. I was deeply og because he keptteaching me until I returned to school. Unde his help, IWithught up with other classmates. From then on,allcame good friends

12.B【解析】本题考查导数与不等式的综合应用,考查构造函数的方法的灵活应用与推理论证能力设g(x)=f(x),h(x)=r)x∈(0,+∞)则g(x)=(x)=1=2(n)-=1(=3(x)+x,(x)=xf(x)=(2因为f(x) 0,所以g(x)在(0,+∞)上单调递减,h(x)在(0,+∞)上单调递增则g(1)>g(2),h(1) 12)=2,1)<(2,即(2+1

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