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Question 1 · Free response · 中档
(5分)若集合 $A = \{ x \vert - 2 < x < 1 \}$ ${ \sf B } = \left\{ { \sf x } \vert { \sf x } < - 1 \right.$ 或 $x > 3 \}$ ,则A∩B=( )A $\{ { \pmb x } | - 2 { < } { \pmb x } { < } - 1 \}$ B $\{ { \pmb { x } } | - 2 { < } { \pmb { x } } { < } 3 \}$ C $\{ { \pmb { \times } } | - 1 { < } { \pmb { \times } } { < } 1 \}$ D $\{ { \pmb { x } } | 1 { < } { \pmb { x } } { < } 3 \}$
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Question 2 · Free response · 中档
(5 分)若复数(1﹣i)(a+i)在复平面内对应的点在第二象限,则实数 a 的取值范围是( )A $( \mathbf { \partial } - \infty , \mathbf { \partial } 1 )$ B $\big ( \begin{array} { l } { - \infty , } & - \ : 1 \big ) \end{array}$ C $( 1 , \ + \infty )$ D $( \mathbf { \partial } - 1 , \mathbf { \partial } + \infty )$
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Question 3 · Free response · 中档
(5分)执行如图所示的程序框图,输出的S值为( )
A.2 B $\frac { 3 } { 2 }$ C $\frac { 5 } { 3 }$ D $\frac { 8 } { 5 }$
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Question 5 · Single choice · 中档
(5分)已知函数 ${ \textbf { \textsf { f } } } ( { \textbf { \textsf { x } } } ) = 3 ^ { \times { \textbf { - } } } ( \frac { 1 } { 3 } ) ^ { \textbf { \textsf { x } } } ,$ ,则f(x)( )
A. 是奇函数,且在R上是增函数 B. 是偶函数,且在 R上是增函数 C. 是奇函数,且在R上是减函数 D. 是偶函数,且在R上是减函数
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Question 6 · Single choice · 中档
(5分)设 $\vec { \cdot } \vec { \pi } , \vec { \pi }$ 为非零向量,则“存在负数λ,使得 $\stackrel { } { \pi } = \lambda \stackrel { } { \ n } ^ { \prime }$ $u _ { \pi } ^ { } . \overset { } { \circ } < 0 ^ { \prime \prime }$ 的( )
A. 充分而不必要条件 B. 必要而不充分条件 C. 充分必要条件 D. 既不充分也不必要条件
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Question 7 · Free response · 中档
(5分)某四棱锥的三视图如图所示,则该四棱锥的最长棱的长度为( )
正(主)视图
侧(左)视图
俯视图
A $3 \sqrt { 2 }$ B $2 \sqrt { 3 }$ C $2 \sqrt { 2 }$ D.2
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Question 8 · Free response · 中档
(5分)根据有关资料,围棋状态空间复杂度的上限 M约为 $3 ^ { 3 6 1 }$ ,而可观测宇宙中普通物质的原子总数N约为 $1 0 ^ { 8 0 }$ ,则下列各数中与 $\frac { \mathbb { M } } { \mathbb { N } }$ 最接近的是( ) (参考数据: $\lvert \ g 3 \approx 0 . 4 8 \ \rangle$ A $1 0 ^ { 3 3 }$ B $\boldsymbol { 1 0 ^ { 5 3 } }$ C $1 0 ^ { 7 3 }$ D $1 0 ^ { 9 3 }$
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Question 9 · Fill in the blank · 中档
(5分)若双曲线 $x^2 - \frac{y^2}{m} = 1$ 的离心率为 $\sqrt{3}$,则实数 $m = $____.
先写答案,再对照解析 等价写法不自动判错
直接输入 Formula Chemistry
π ² √ ≤ ≥ ∞ ∈ ∴
写好了,对答案
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Question 10 · Free response · 中档
(5 分)若等差数列 $\{ \mathsf { a } _ { \mathsf { n } } \}$ 和等比数列 $\{ { \sf b } _ { \sf n } \}$ 满足 $\mathsf { a } _ { 1 } = \mathsf { b } _ { 1 } = - \ 1$ $a _ { 4 } = b _ { 4 } = 8$ ,则 $\frac { a _ { 2 } } { b _ { 2 } } =$ 1
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Question 11 · Free response · 中档
(5 分)在极坐标系中,点 A 在圆 $\rho ^ { 2 } - 2 \rho \ c o s \Theta - 4 \rho \ s \mathsf { i n } \Theta + 4 = 0$ 上,点 P 的坐标为(1,0),则|AP|的最小值为 1
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Question 12 · Free response · 中档
(5 分)在平面直角坐标系xOy中,角α 与角β均以Ox为始边,它们的终边关于y轴对称,若 $\sin a = \frac { 1 } { 3 }$ ,则 $\cos ( \alpha - \beta ) = - \frac { 7 } { 9 }$
Answer key $- \frac { 7 } { 9 }$
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Question 13 · Free response · 中档
(5分)能够说明“设a,b,c是任意实数.若 $a > b > c$ ,则 $\mathsf { a } ^ { + } \mathsf { b } > \mathsf { c } ^ { \prime \prime }$ 是假命题的一组整数a,b,c的值依次为 $\_ 1 , \_ 2 , \_ 3$
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Question 15 · Free response · 中档
(13 分)在 $\triangle A B C$ 中, $\angle A = 6 0 ^ { \circ } , c = \frac { 3 } { 7 } a$
(1)求sinC的值;
(2)若 a=7,求 $\triangle A B C$ 的面积
Answer key (1) $\frac { 3 \sqrt { 3 } } { 1 4 }$; (2) $6 \sqrt { 3 }$
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Question 18 · Free response · 中档
(14 分)已知抛物线 C:$y^2=2px$ 过点 P(1,1).过点 $\left(0,\dfrac{1}{2}\right)$ 作直线 l 与抛物线 C 交于不同的两点 M,N,过点 M 作 x 轴的垂线分别与直线 OP、ON 交于点 A,B,其中 O 为原点. (1)求抛物线 C 的方程,并求其焦点坐标和准线方程; (2)求证:A 为线段 BM 的中点.
Answer key (1)$y^2=x$,焦点坐标为 $\left(\dfrac{1}{4},0\right)$,准线为 $x=-\dfrac{1}{4}$;(2)证明见解析
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