题目

函数的最小值为(    ) A．10      B．9         C．6        D．4 答案：A 解析:，选A.听下面一段材料，回答第1-4题。1. What will the students visit in the morning?A. The CNN Studios  B. The Atlanta Zoo     C. Lookout Mountain2. When will the students get to Chattanooga?A. At six o’clock      B. At eight o’clock       C. At five o’clock3. What should be handed to the receptionist?A. The remote controls   B. The cups     C. The key4. What must the students do after the trip?A. Go to class      B. Write about the trip    C. Hand in some pictures