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阅读理解

　　There are three different kinds of friends in our life．I classify(分类)them according to how well I know them and how well they know me．

　　The first type of friend is just an acquaintance(熟人)．This means that you only know their name．You might not even remember what they look like if you go away for a short vacation．You don't miss them when they are elsewhere．It is also this type of friend who gives you the most amount of aggravation(恼怒)．Since most of the time you are placed in a position where you have to act friendly．You would not normally tell an acquaintance when he or she is doing something that makes you feel angry, such as tapping the fingers on a table or shouting loudly．I call them “pest friends”．

　　The second kind of friend is a “guest friend”．They are just social partners．You meet them at a certain location and at the end of the meeting you go your separate way and they go theirs．You don't talk too often with this sort of friend, and you don't share each other's secrets．

　　Lastly, we have “best friends”．This sort of friend is there when you need them．They know you as a person and they are there through thick and thin．Best friends are the ones that you can lean and depend on no matter what happens．If you need a listening ear, they will be the one to lend support．

　　Friends come in all different shapes and sizes．Every friend has an impact on our life…

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阅读理解

　　Have you ever wondered why stems(茎)grow upwards and roots downwards? Why plants always seem to turn, towards the light and climbing plants run up rather than down? The answer is simple：auxin,a chemical substance that controls growth in plants．

　　Auxin is a plant hormone(激素)．Darwin was already interested in it in the 19th century．Only in recent years, however, has the hormone started to give away its secrets ,thanks to intensive molecular research．Auxin is produced in the young,growing parts of plants and then transported throughout the plant－to a low -lying stem for example．The stem needs to straighten out as soon as possible to be able to absorb the topside,resulting in the underside growing faster and the stem straightening out．For the same reason, plants in front of windows will always turn to the light．This active regulation of auxin transport allows plants to take ideal advantage of local and changing conditions．

　　The transport of auxin through the plant plays a vital role．And ,from all appearances,it is not a simple matter．The researchers identified an important new link and means of transport for auxin：PILS proteins(蛋白质)．PILS proteins are vital for auxin-dependent plant growth and adjust the intracellular(细胞内的)storage of the hormone．It is exactly this compartmentalizing(分类)of auxin that seems functionally important for the various developmental processes．

　　Higher auxin levels at the right moment and in the right place result in better growth and greater harvest．Better adjustment of auxin levels would make plants grow more efficiently．The researchers hope to contribute to the development of more efficient growing processes by continuing to sort out auxin transport processes．

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阅读下列短文，从每题所给的A、B、C和D项中选出最佳选项。

　　In your surroundings, nearly every person has his or her own way of doing things．Some people are outgoing, some enjoy keeping to themselves and others prefer a little of both．In fact, we can classify people into four basic personality types or behavioral styles．

　　Look around your office and see if you can see any of these people．We'll call the first person Dave．Dave likes immediate results and tends not to listen to details before making decisions．He acts quickly and often cuts people off mid-sentence．Then there's Stan．Stan is very predictable and patient．He's loyal to the organization and listens attentively．Or how about Ingrid? Ingrid is optimistic and looks for the best in everyone．She enjoys conversations, networking events and spreading her influence．She has recently bought a fitness center．She discovered that when the center is empty, she goes crazy．She likes to have people around her all of the time and can't stand the quiet of the afternoon．Finally, we have Catherine．Catherine is interested in accuracy and details．She enjoys working alone and prefers to use diplomacy(外交)to solve conflicts rather than action．

　　Each of them demonstrates one of the four primary behavioral styles．These are dominance(支配型), influence, steadiness and conscientiousness(思维清醒型)．Dominant people are direct and decisive; they like accepting challenges, taking action, and getting immediate results．Influential people are optimistic and outgoing; they prefer to participate in teams, share ideas, and entertain others．Steady people are sympathetic and cooperative; they like working behind the scenes and being good listeners．Conscientious people are concerned and correct; they like planning ahead, employing systematic approaches and checking and re-checking for accuracy．

　　Let's take Dave for example．He fits into the Dominance behavioral style．Dave likes to make quick decisions and solve problems, but he sometimes has trouble understanding that people need people and, as such, finds it hard to identify with the group．We need people like Dave because he moves things forward．To be most effective, Dave needs people who can handle the details he often ignores．

　　So which personality style is the best? Which is most effective? The answer is that each of us is effective in dealing with different people, problems, situations and careers; we each have our own style．

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