2021蜀山区三模数学 (2021蜀山区一模英语)

第一部分：选择题（每题3分，共24分）

1. 下列说法中，正确的是（ ）A. 1的相反数是-1B. 1和-1是互相对称的数C. 1和-1是互为倒数的数D. 1和-1是同号数2. 下列方程的解是（ ）A. x + 2 = 5，x = 3B. 2x - 5 = 1，x = 3C. 3x + 1 = 10，x = 3D. 4x - 2 = 6，x =23. 下列图形中，不是轴对称图形的是（ ）A. 圆B. 正方形C. 直角三角形D. 等腰梯形4. 下列数据中，众数是（ ）A. 2, 3, 4, 5, 6, 7, 8, 9B. 2, 3, 4, 5, 6, 7, 8, 9, 9C. 2, 3, 4, 5, 6, 7, 8, 9, 9, 9D. 2, 3, 4, 5, 6, 7, 7, 8, 9

第二部分：填空题（每题4分，共40分）

5. (-3)的绝对值是 ______。 6. 分数2/5的小数形式是 ______。 7. 1/4 ÷ 2/3 = ______。 8. 已知棱长为3的正方体的体积是 ______。 9. 抛一枚硬币，出现正面的概率是 ______。 10. 一次函数y = 2x + 3的图象经过点 ______。

第三部分：解答题（共96分）

11. （16分）解方程：2x + 5 = 15 12. （16分）解不等式：3x - 2 ≥ 10 13. （16分）求圆的面积，已知圆的直径是8cm。 14. （16分）一个矩形的长是宽的3倍，求这个矩形的面积，已知矩形的周长是30cm。 15. （16分）已知抛一枚硬币两次，求出现两次正面的概率。

第一部分：完形填空（每题2分，共20分）

阅读下面短文，从A、B、C、D四个选项中选出可以填入空白处的最佳答案。One day, I was walking down the street when I saw a little girl crying. I asked her what was wrong, and she told me that she had lost her dog. I felt sorry for her, so I decided to help her find it.We searched the neighborhood for hours, but we couldn't find the dog. Just when we were about to give up, we heard a faint bark coming from a nearby park. We ran to the park and there was the dog! The little girl was overjoyed, and she thanked me again and again.I felt ______ that I could help her. It was a small thing, but it made a big difference to her. I realized that sometimes the ______ things in life can be the most ______.1. A. proudB. happyC. sorryD. embarrassed 2. A. expensiveB. importantC. difficultD. interesting 3. A. usefulB. rewardingC. challengingD. meaningful

第二部分：阅读理解（每题4分，共40分）

阅读下面短文，回答问题。The GreatWall of ChinaThe Great Wall of China is one of the most famous landmarks in the world. It was built over 2,000 years ago to protect China from invaders. The wall is over 13,000 miles long, and it took over 100 million people to build it.The Great Wall is not just a single wall. It is actually a series of walls, towers, and fortresses that stretch across China. The wall was built over centuries, and each dynasty added to it.The Great Wall is a UNESCO World Heritage Site. It is one of the most popular tourist destinations in China. Millions of people visit the wall each year to experience its history and beauty.1. When was the Great Wall of China built? 2. How long is the Great Wall of China? 3. Why was the Great Wall built? 4. What is a UNESCO World Heritage Site?

第三部分：写作（共40分）

题目：以“My Favorite Season”为题写一篇短文，描述你最喜欢的季节并说明原因。