阅读下面5段有关Mike, Mary, Robert, Lily和Tom的材料。请从A—F选项中选出符合各人需求的最佳选项。选项中有一项是多余选项。
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Mike likes sports and travel．He would like something that he can take with him on his journey, especially when he is camping or hiking, because sometimes it is hard to find the directions(方向)．
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Mary likes parties and discos．She likes to look smart, and she is very fond of music．She says she tikes books, but she never reads any．Now, she wants to learn ho musical instrument(乐器)．
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Robert is an 80-year-old mail．He likes doing exercise in the morning．But one week ago, the doctor told him that he suffered from osteoporosis(骨质疏松)in a common health examination．
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Lily is a beautiful girl．She sings well and is going to perform at the New Year's party．She'd like to wear something that is attractive at the party．
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Tom is a junior student．He likes reading and playing basketball．He would like to read something about adventures．
A | A scarf, a good present for ladies．In winter, in addition to keeping you Warm, a scarf |
B | Guitar Beginners．Do you like music? Do you want to play the guitar well in a short time? This new book, writen by guitarist Frank Jones, helps even the most basic beginner on his way to being a proper guitar player in just 20 days． |
C | The Adventure of Tom Sawyer is a short novel written by Mark Twain, an American famous writer．It is very interesting and adventurous． |
D | The Milk Calcium(钙), produced for the senior．More and more people have realized that to be healthy is really the most important．The milk Calcium is especially good for the ones who lack calcium． |
E | The Classic Explorer's Compass(指南针), a precious instrument, will help you know wherever you are．Each comes with its own waterproof leather case．
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F | Super Shoes, the sports shoes liked by all the young．Wearing Super Shoes can be attractive．It is said that Super Shoes can help you to be the winner in every sports game．
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有两个不相等的实数解，则实数m的取值范围（ ）