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Question 1 · Single choice · 中档
(5分)已知集合 $\cdot \mathsf { A } = \{ 1 , ~ 2 , ~ 3 , ~ 4 , ~ 5 \}$ ${ \mathsf { B } } { \mathsf { = } } \left\{ { \begin{array} { l l } { ( { \mathsf { x } } , { \mathsf { \Delta y } } ) } & { { \mathsf { | x } } { \mathsf { \in } } { \mathsf { A } } , \forall { \mathsf { E } } { \mathsf { A } } , \mathsf { x } \not { \mathsf { \Sigma } } { \mathsf { \Sigma } } { \mathsf { \Sigma } } { \mathsf { \Sigma } } { \mathsf { \Sigma } } { \mathsf { \Sigma } } { \mathsf { \Sigma } } { \mathsf { \Sigma } } } \end{array} } \right.$ ,则B中所含元素的个数为( )
A. 3 B. 6 C. 8 D. 10
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Question 2 · Single choice · 中档
(5分)将2名教师,4名学生分成2个小组,分别安排到甲、乙两地参加社会实践活动,每个小组由1名教师和2名学生组成,不同的安排方案共有()
A. 12种 B. 10种 C. 9种 D. 8种
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Question 3 · Single choice · 中档
(5分)下面是关于复数$z=\frac{2}{-1+i}$的四个命题:其中的真命题为( ), $p_1$: $|z|=2$, $p_2$: $z^2=2i$, $p_3$: $z$的共轭复数为$1+i$, $p_4$: $z$的虚部为$-1$.
A. $p_2$,$p_3$ B. $p_1$,$p_2$ C. $p_2$,$p_4$ D. $p_3$,$p_4$
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Question 4 · Free response · 中档
(5分)设 $\mathsf { F } _ { 1 } , ~ \mathsf { F } _ { 2 }$ 是椭圆E: $\frac { x ^ { 2 } } { a ^ { 2 } } + \frac { y ^ { 2 } } { b ^ { 2 } } = 1 ( a > b > 0 )$ )的左、右焦点,P为直线 $\mathbf { \nabla } \times =$ $\frac { 3 \tt a } { 2 }$ 上一点, $\triangle \mathsf { F } _ { 2 } \mathsf { P F } _ { 1 }$ 是底角为 ${ \mathfrak { 3 0 } } ^ { \circ }$ 的等腰三角形,则E的离心率为(A $\frac 1 2$ B $\frac { 2 } { 3 }$ C $\frac { 3 } { 4 }$ D $\frac { 4 } { 5 }$
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Question 5 · Single choice · 中档
(5分)已知 $\{ \mathsf { a } _ { \mathsf { n } } \}$ 为等比数列, $\partial _ { 4 } + \partial _ { 7 } = 2$ $\mathsf { a } _ { 5 } \mathsf { a } _ { 6 } \mathsf { = } - 8$ ,则 $\mathtt { a } _ { 1 } + \mathtt { a } _ { 1 0 } =$ ( )
A. 7 B. 5 C. ﹣5 D. ﹣7
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Question 6 · Single choice · 中档
(5分)如果执行右边的程序框图,输入正整数N(N≥2)和实数 $\mathsf { a } _ { 1 }$ , $\mathbf { a } _ { 2 } , \dots$ , $\mathsf { a } _ { \mathsf { n } } \mathrm { : }$ ,输出A,B,则( )
A. A+B为 $\mathtt { a } _ { 1 }$ , $\mathsf { a } _ { 2 } , \ldots , \mathsf { a } _ { \mathsf { n } }$ 的和 B. $\textstyle { \frac { A + B } { 2 } }$ 为 $\mathsf { I a } _ { 1 }$ , $\mathsf { a } _ { 2 } , \ldots , \mathsf { a } _ { \mathsf { n } }$ 的算术平均数 C. A和B分别是 $\mathsf { a } _ { 1 } , ~ \mathsf { a } _ { 2 } , ~ . . . , ~ \mathsf { a } _ { \mathsf { n } }$ 中最大的数和最小的数 D. A和B分别是 $\mathsf { a } _ { 1 } , ~ \mathsf { a } _ { 2 } , ~ . . . , ~ \mathsf { a } _ { \mathsf { n } }$ 中最小的数和最大的数
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Question 7 · Single choice · 中档
(5分)如图,网格纸上小正方形的边长为1,粗线画出的是某几何体的三视图,则此几何体的体积为( )
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A. 6 B. 9 C. 12 D. 18
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Question 8 · Free response · 中档
(5分)等轴双曲线C的中心在原点,焦点在x轴上,C与抛物线 $\mathsf { y } ^ { 2 } = 1 6 \mathsf { x }$ 的准线交于点A和点B, $\left| \mathsf { A B } \right| = 4 \sqrt { 3 } ,$ 则C的实轴长为( )A $\sqrt { 2 }$ B $2 \sqrt { 2 }$ C.4 D.8
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Question 9 · Free response · 中档
(5分)已知 $\omega { > } 0$ ,函数f $( x ) = \sin ( w x + \frac { \pi } { 4 } )$ 在区间 $[ \frac { \pi } { 2 }$ ,π]上单调递减,则实数ω的取值范围是( )A $[ \frac { 1 } { 2 } , \ \frac { 5 } { 4 } ]$ B $[ \frac { 1 } { 2 } , \ \frac { 3 } { 4 } ]$ C. $\frac 1 2 ]$ D.( $( 0 , \ 2 ]$
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Question 11 · Free response · 中档
(5分)已知三棱锥S﹣ABC的所有顶点都在球O的表面上, $\triangle A B C$ 是边长为1的正三角形,SC为球O的直径,且SC=2,则此三棱锥的体积为( )A $\frac { 1 } { 4 }$ B $\frac { \sqrt { 2 } } { 4 }$ C $\frac { \sqrt { 2 } } { 6 }$ D $\frac { \sqrt { 2 } } { 1 2 }$
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Question 12 · Free response · 中档
(5分)设点P在曲线 $y = \frac { 1 } { 2 } e ^ { x }$ 上,点Q在曲线 ${ \mathsf { y } } { = } { \mathsf { l n } } \ ( 2 { \mathsf { x } } )$ 上,则 $| \mathsf { P Q } |$ 最小值为( )A $1 - \ln 2$ B $\sqrt { 2 } \left( 1 - 1 { \mathrm { n } } 2 \right)$ C $1 + 1 { \mathsf n } 2$ D. $\sqrt { 2 } \left( 1 { + } 1 { \mathrm { n } } 2 \right)$
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Question 14 · Free response · 中档
(5分)设x,y满足约束条件: $\left\{ \begin{array} { l l } { { \tt x } \geqslant 0 , { \tt y } \geqslant 0 } \\ { { \tt x } - { \tt y } \geqslant - 1 } \\ { { \tt x } + { \tt y } \leqslant 3 } \end{array} \right.$ ;则 $z = x - 2 y$ 的取值范围为
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 √ ≤ ≥ ∞ ∈ ∴
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Question 16 · Fill in the blank · 中档
(5分)数列$\{a_n\}$满足$a_{n+1}+(-1)^n a_n=2n-1$,则$\{a_n\}$的前60项和为______.
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 √ ≤ ≥ ∞ ∈ ∴
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Question 17 · Free response · 中档
(12分)已知a,b,c分别为△ABC三个内角A,B,C的对边,$a\cos C+\sqrt{3}a\sin C-b-c=0$ (1)求A; (2)若a=2,△ABC的面积为$\sqrt{3}$;求b,c.
Answer key (1)$A=60^\circ$;(2)$b=2,\,c=2$
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