First, multiple-choice questions (3 points for each small question, 36 points for * * *)

The cube root and root number 64 of 1 are ()

A.4 B.2 C. 4 D. 2

3. On June 3, 2004, the central news reported that in order to encourage residents to save water, Beijing will introduce a new standard for residents' water charges: ① If the monthly water consumption of each household does not exceed 4 cubic meters, it will be calculated according to the 2 yuan per cubic meter; (2) If the monthly water consumption of each household exceeds 4 cubic meters, the excess shall be calculated as per cubic meter of 4.5 yuan (the excess shall still be calculated as per cubic meter of 2 yuan). Now suppose that a household in this city uses one cubic meter of water for one month, and the water fee is RMB, then the functional relationship between the image and is ().

4. Vertices A, B, C and D in the rectangular ABCD are arranged clockwise. If the coordinates corresponding to point B and point D are (2,0) and (0,0) respectively in the plane rectangular coordinate system, and point A and point C are symmetrical about X, the coordinates corresponding to point C are ().

a 、( 1， 1) B 、( 1，- 1) C 、( 1，-2) D 、( 2，-2)

5. It is known that the image has a linear function y=kx+b (as shown in figure 1). When x < 0, the value range of y is ().

a、y>0 B、y