题目

III. PART THREE  READING COMPREHENSION (24 points) Directions: Read the following three passages. Each passage is followed by several questions or unfinished statements. For each of them there are 4 choices marked A,B,C and D. Choose the one that fits best according to the information given in the passage. Some time ago, I discovered that one of my chairs had a broken leg. I didn’t think there would be any difficulty in getting it mended, as there are a whole lot of antique (古董) shops near my home. So I left home one morning carrying the chair with me. I went into the first shop expecti(1），  则     （4分）  （2）由（1）知，则  ①当时，，令或 ， 在上的值域为                              （7分） ② 当时，      a.若,则                          b.若,则在上是单调减的   在上的值域为                           c.若则在上是单调增的   在上的值域为                         （9分） 综上所述，当时，在的值域为                        当时，在的值域为                  （10分）          当时，若时，在的值域为 若时，在的值域为 （12分） 即  当时，在的值域为 当时，在的值域为 当时，在的值域为