解答图中的每道题---```plain
数学试题卷
说明: 1. 全卷满分120分, 考试时间120分钟.
2. 请将答案写在答题卡上, 否则不给分.
一、选择题(本大题共6小题, 每小题3分, 共18分. 每小题只有一个正确选项)
1. -2 的相反数是
A. 2
B. -2
C. $\frac{1}{2}$
D. $-\frac{1}{2}$
2. 如图, 几何体的主视图是
[Image Description: Question 2 Figure]
Type: 3D geometric figure and 2D options.
Main Elements:
- A 3D drawing showing a rectangular prism on the left and a cylinder on the right, adjacent to each other.
- An arrow labeled "正视图" (Front View) indicating the viewing direction is from the front (towards the viewer).
- Below the 3D figure are four 2D diagrams labeled A, B, C, D.
- Diagram A: A single rectangle.
- Diagram B: A rectangle with a dashed vertical line down the center.
- Diagram C: Two adjacent rectangles of different widths.
- Diagram D: A square and a circle next to it.
3. 计算 $\frac{a+1}{a} - \frac{1}{a}$ 的结果为
A. 1
B. -1
C. $\frac{a+2}{a}$
D. $\frac{a-2}{a}$
4. 如图是2020年中国新能源汽车购买用户地区分布图, 由图可知下列说法错误的是
[Image Description: Question 4 Figure]
Type: Pie chart.
Main Elements:
- Title (implied by stem): Regional distribution of new energy vehicle buyers in China in 2020.
- Sections labeled with region names and percentages:
- 一线城市 (First-tier cities): 46%
- 二线城市 (Second-tier cities): 37%
- 三四线城市 (Third/Fourth-tier cities): 11%
- 四线城市以下 (Below Fourth-tier cities): 6%
- Label: (第4题) (Question 4)
A. 一线城市购买新能源汽车的用户最多
B. 二线城市购买新能源汽车用户达37%
C. 三四线城市购买新能源汽车用户达到11万
D. 四线城市以下购买新能源汽车用户最少
5. 在同一平面直角坐标系中, 二次函数 $y=ax^2$ 与一次函数 $y=bx+c$ 的图象如图所示, 则二次函数 $y=ax^2+bx+c$ 的图象可能是
[Image Description: Question 5 Figure]
Type: Coordinate plane graphs.
Main Elements:
- The initial figure shows a Cartesian coordinate system with X and Y axes intersecting at the origin O.
- The graph of $y=ax^2$ is a parabola opening downwards with its vertex at the origin.
- The graph of $y=bx+c$ is a straight line with a positive slope, intersecting the positive X-axis and the positive Y-axis.
- Below are four figures labeled A, B, C, D, each showing a parabola on a coordinate plane.
- Figure A: Parabola opens downwards, vertex to the left of the Y-axis, Y-intercept is positive.
- Figure B: Parabola opens downwards, vertex to the right of the Y-axis, Y-intercept is positive.
- Figure C: Parabola opens upwards, vertex to the right of the Y-axis, Y-intercept is positive.
- Figure D: Parabola opens upwards, vertex to the right of the Y-axis, Y-intercept is negative.
- Label: (第5题) (Question 5)
A. [Graph A]
B. [Graph B]
C. [Graph C]
D. [Graph D]
数学试题卷 第1页 (共6页)
```