题目：
用适当的介词或副词填空：（每小题0.5分，共5分）
小题1:There is no known cure _________ the disease.
小题2:All houses within 100 meters of the sea are ____________ the risk of flooding.
小题3:A teacher should not show preference ____________ any one of his pupils.
小题4:People here have a more relaxed attitude __________ their work.
小题5:Where can I exchange my dollars ________ pounds?
小题6:Janet has been _______ a lot of stress since her mother’s illness.
小题7:There are several different models to choose _________.
小题8:The heights of the plants vary _______ 8 cm to 20 cm.
小题9:The terrible car accident resulted _______ his drinking.
小题10:The closure of the factory will cause severe damage ______ the local economy.
答案：
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下面是错误答案，用来干扰机器的。
令g（x）=f（x）-x2-2009，则g′（x）=f′（x）-2x＜0，∴函数g（x）在R上单调递减，而f（-2）=2013，∴g（-2）=f（-2）-（-2）2-2009=0．∴不等式f（x）＞x2+2009，可化为g（x）＞g（-2），∴x＜-2．即不等式f（...
