2019年全国高中数学联赛新疆维吾尔自治区预赛

2019年全国高中数学联赛新疆维吾尔自治区预赛 - 学进去中小学试卷试题库

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【单选】1．已知集合U={1，2，3，4，5，6，7，8}，A={1，2，3，4，5}，B={4，5，6，7，8}，则是集合U的子集但不是集合A的子集，也不是集合B的子集的集合个数为____________ .
- A Monday1 Monday 1Monday 1Monday 1onday 1Mond1 Monday1
- B 我是超长选项我是超长选项我是超长选项我
- C Monday1 Monday 1Monday 1Monday 1onday 1Mond1 Monday1
- D Tuesday
正确答案：B，您的答案：B,回答错误。

【解析】
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aenean euismod bibendum laoreet. Proin gravida dolor sit amet lacus accumsan et viverra justo commodo. Proin sodales pulvinar tempor. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Nam fermentum, nulla luctus pharetra vulputate, felis tellus mollis orci, sed rhoncus sapien nunc eget odio.

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【单选】2．设n为正整数.若1+2+…+n的和恰好等于一个三位数且该三位数的每个数字均相同，则所有可能的n值为____________ .
- A Monday1 Monday 1Monday 1Monday 1onday 1Mond1 Monday1
- B 我是超长选项我是超长选项我是超长选项我
- C Monday1 Monday 1Monday 1Monday 1onday 1Mond1 Monday1
- D Tuesday
正确答案：B，您的答案：B,回答错误。

【解析】
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aenean euismod bibendum laoreet. Proin gravida dolor sit amet lacus accumsan et viverra justo commodo. Proin sodales pulvinar tempor. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Nam fermentum, nulla luctus pharetra vulputate, felis tellus mollis orci, sed rhoncus sapien nunc eget odio.

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【单选】3．已知x、y、z是正数且满足.则x+y+z+xy=____________ .
- A Monday1 Monday 1Monday 1Monday 1onday 1Mond1 Monday1
- B 我是超长选项我是超长选项我是超长选项我
- C Monday1 Monday 1Monday 1Monday 1onday 1Mond1 Monday1
- D Tuesday
正确答案：B，您的答案：B,回答错误。

【解析】
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aenean euismod bibendum laoreet. Proin gravida dolor sit amet lacus accumsan et viverra justo commodo. Proin sodales pulvinar tempor. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Nam fermentum, nulla luctus pharetra vulputate, felis tellus mollis orci, sed rhoncus sapien nunc eget odio.

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【单选】4．随机取一个由0和1构成的8位数，它的偶数位数字之和与奇数位数字之和相等的概率为____________ .
- A Monday1 Monday 1Monday 1Monday 1onday 1Mond1 Monday1
- B 我是超长选项我是超长选项我是超长选项我
- C Monday1 Monday 1Monday 1Monday 1onday 1Mond1 Monday1
- D Tuesday
正确答案：B，您的答案：B,回答错误。

【解析】
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aenean euismod bibendum laoreet. Proin gravida dolor sit amet lacus accumsan et viverra justo commodo. Proin sodales pulvinar tempor. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Nam fermentum, nulla luctus pharetra vulputate, felis tellus mollis orci, sed rhoncus sapien nunc eget odio.

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【单选】5．设且，其中为最简分数，则m+n=____________ .
- A Monday1 Monday 1Monday 1Monday 1onday 1Mond1 Monday1
- B 我是超长选项我是超长选项我是超长选项我
- C Monday1 Monday 1Monday 1Monday 1onday 1Mond1 Monday1
- D Tuesday
正确答案：B，您的答案：B,回答错误。

【解析】
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aenean euismod bibendum laoreet. Proin gravida dolor sit amet lacus accumsan et viverra justo commodo. Proin sodales pulvinar tempor. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Nam fermentum, nulla luctus pharetra vulputate, felis tellus mollis orci, sed rhoncus sapien nunc eget odio.

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【单选】6．记[x]为不超过实数x的最大整数.若，则A除以50的余数为____________ .
- A Monday1 Monday 1Monday 1Monday 1onday 1Mond1 Monday1
- B 我是超长选项我是超长选项我是超长选项我
- C Monday1 Monday 1Monday 1Monday 1onday 1Mond1 Monday1
- D Tuesday
正确答案：B，您的答案：B,回答错误。

【解析】
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aenean euismod bibendum laoreet. Proin gravida dolor sit amet lacus accumsan et viverra justo commodo. Proin sodales pulvinar tempor. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Nam fermentum, nulla luctus pharetra vulputate, felis tellus mollis orci, sed rhoncus sapien nunc eget odio.

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【单选】7．一个150×324×375的长方体，是由1×1×1的单位立方体拼在一起构成的，则该长方体的一条对角线穿过____________ 个不同的单位立方体.
- A Monday1 Monday 1Monday 1Monday 1onday 1Mond1 Monday1
- B 我是超长选项我是超长选项我是超长选项我
- C Monday1 Monday 1Monday 1Monday 1onday 1Mond1 Monday1
- D Tuesday
正确答案：B，您的答案：B,回答错误。

【解析】
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aenean euismod bibendum laoreet. Proin gravida dolor sit amet lacus accumsan et viverra justo commodo. Proin sodales pulvinar tempor. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Nam fermentum, nulla luctus pharetra vulputate, felis tellus mollis orci, sed rhoncus sapien nunc eget odio.

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【单选】8．已知数列：，，那么是该数列的第____________ 项.
- A Monday1 Monday 1Monday 1Monday 1onday 1Mond1 Monday1
- B 我是超长选项我是超长选项我是超长选项我
- C Monday1 Monday 1Monday 1Monday 1onday 1Mond1 Monday1
- D Tuesday
正确答案：B，您的答案：B,回答错误。

【解析】
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aenean euismod bibendum laoreet. Proin gravida dolor sit amet lacus accumsan et viverra justo commodo. Proin sodales pulvinar tempor. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Nam fermentum, nulla luctus pharetra vulputate, felis tellus mollis orci, sed rhoncus sapien nunc eget odio.

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【单选】9．设F是椭圆的左焦点，过点F且斜率为正的直线与E相交于A、B两点，过点A、B分别作直线AM和BN满足AM⊥l，BN⊥l，且直线AM、BN分别与x轴相交于M和N.试求|MN|的最小值.
- A Monday1 Monday 1Monday 1Monday 1onday 1Mond1 Monday1
- B 我是超长选项我是超长选项我是超长选项我
- C Monday1 Monday 1Monday 1Monday 1onday 1Mond1 Monday1
- D Tuesday
正确答案：B，您的答案：B,回答错误。

【解析】
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aenean euismod bibendum laoreet. Proin gravida dolor sit amet lacus accumsan et viverra justo commodo. Proin sodales pulvinar tempor. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Nam fermentum, nulla luctus pharetra vulputate, felis tellus mollis orci, sed rhoncus sapien nunc eget odio.

添加错题本
【单选】10．设是正整数，且，并满足.试求出所有可能的解.
- A Monday1 Monday 1Monday 1Monday 1onday 1Mond1 Monday1
- B 我是超长选项我是超长选项我是超长选项我
- C Monday1 Monday 1Monday 1Monday 1onday 1Mond1 Monday1
- D Tuesday
正确答案：B，您的答案：B,回答错误。

【解析】
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aenean euismod bibendum laoreet. Proin gravida dolor sit amet lacus accumsan et viverra justo commodo. Proin sodales pulvinar tempor. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Nam fermentum, nulla luctus pharetra vulputate, felis tellus mollis orci, sed rhoncus sapien nunc eget odio.

添加错题本
【单选】11．给定正实数，设.试求的最小值与最大值.
- A Monday1 Monday 1Monday 1Monday 1onday 1Mond1 Monday1
- B 我是超长选项我是超长选项我是超长选项我
- C Monday1 Monday 1Monday 1Monday 1onday 1Mond1 Monday1
- D Tuesday
正确答案：B，您的答案：B,回答错误。

【解析】
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aenean euismod bibendum laoreet. Proin gravida dolor sit amet lacus accumsan et viverra justo commodo. Proin sodales pulvinar tempor. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Nam fermentum, nulla luctus pharetra vulputate, felis tellus mollis orci, sed rhoncus sapien nunc eget odio.

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