Examination time 120 minutes? /kloc-0 out of 50.

First, multiple-choice questions (5 points for each small question, ***60 points)

1. Set a set? ,, and then (? )

A.？ B? C. D。

2. Then make a set? (? )

A.b? c？ D.

3. Which of the following two functions is the same function ()?

A. with what? B. with?

C. with what? D. With

4. Among the following functions, which one is the function whose domain is [0, +∞)? (? )

A.？ BC? D.

5. The function f (x) = x2-MX+5 is the increasing function in the interval [-2, +∞], the subtraction function in the interval (-∞, -2), and the value of the real number m is equal to ().

A.2？ B.-2 C.8 D.-4

6. In the figure below, the function image is (? )