题目

Mrs. Green wants to buy that kind of cloth because she___________ that the cloth__________ very well. A. has been told;washes             B. is told;is washed C. has been told ;is washed          D. is told ;is washed 答案:A 解析: 根据语境,第一个空白处应该使用现在完成时的被动语态,第二个空白处应该选用washes,因为wash这个动词也可作不及物动词使用,它的词意是“耐洗”。英语中This cloth washes well表达的是:这布很耐洗。10.已知函数f(x)=log0.5(x-1)x∈[3,5],(1)设g(x)=f-1(x),求g(x)的解析式;(2)是否存在实数m,使得关于x的不等式2xg(2x)-mg(x)+1≤0有解?若存在,求m的取值范围;若不存在,说明理由.
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