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第四部分写作(共两节,满分35分)第一节短文改错(共10小题;每小题1分,满分10分)Have you ever looked around in a cafe and notice that everyone else has their eyes gluedto their smartphones? You're probable one of them Over 1.8 billion people own smart-phonesbut use their devices on a daily basis. Studies have found that a average person checks his or herphone about 150 time a day. This"addiction"on technology reaches even youngest membersof soDr Jenny Radesky noticed that smartphones took oKparents' attention away from ourchildren. She is worried that this could affect children emotional development. Thereforechildrenswe should pay enough attention to this phenomenon and make some changes

7.C【解析】函数f(x)=(x2 1)则f(-x)=(x =-f(x),所以f(x)为奇函数,排除B选项;文科数学参考答案(长郡版)-1当x十 ∞时,∫(x)=加十∞,所以排除A选项;当x=1时,()==se≈2.72-0.37In 20.69≈3.4,排除D选项综上可知,C为正确选项,故选C