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Offering Your Seat 让座 Write an essay of 160-200 words based on the drawing. In your essay, you should 1)describe the drawing briefly, 2)explain its intended meaning, and 3)give your comments.

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The Only Child 独生子女 Write an essay of 160-200 words based on the drawing. In your essay, you should 1)describe the drawing briefly, 2)explain its intended meaning, and 3)give your comments.

烟草烟雾含有4000 余种化学物质,包括几十种致癌物以及一氧化碳等有害物质。()

设TCP使用的最大窗口为64 KB,即64×1024字节,而传输信道的带宽可认为是不受限制的。若报文段的平均往返时延为20ms,问所能得到的最大吞吐量是多少?

感冒了就要到医疗机构进行输液抗菌治疗。()

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