1.已知集合{32,}A x x n n ==+∈N ,{6,8,10,12,14}B =,则A
B 中的元素个数为
(A )5 (B )4
(C )3 (D )2
2.设集合
,,则
(A ){1,3}(B ){3,5}(C ){5,7}(D ){1,7} 3.已知集合A ={}|2x x <,B ={}|320x x ->,则
A .A
B =3|2x x ⎧⎫<⎨⎬⎩
⎭
B .A B =∅
C .A
B 3|2x x ⎧
⎫=<⎨⎬⎩
⎭
D .A
B=R
4.已知集合{}02A =,,{}21012B =--,,,,,则A B =
A .{}02,
B .{}12,
C .{}0
D .{}21012--,,
,, 5.已知集合{1U =,2,3,4,5,6,7},{2A =,3,4,5},{2B =,3,6,7},则(U
B
A =
)
A .{1,6}
B .{1,7}
C .{6,7}
D .{1,6,7}
6.已知集合{|12}A x x =-<<,{|03}B x x =<<,则A
B = A .(1,3)-
B .(1,0)-
C .(0,2)
D .(2,3)
7.已知集合,则
(A ) (B ) (C ) (D ) 8. 设集合{1,2,3},{2,3,4}A B ==,则A B =
A. {}123,4,,
B. {}123,,
C. {}234,,
D. {}134,,
9.已知集合{}1,3,5,7A =,{}2,3,4,5B =,则A
B =
A .{}3
B .{}5
C .{}3,5
D .{}1,2,3,4,5,7
10.已知集合{|1}A x x =>-,{|2}B x x =<,则(A B = )
A .(1,)-+∞
B .(,2)-∞
C .(1,2)-
D .∅
(1)设集合{0,2,4,6,8,10},{4,8}A B ==,则A B = (A ){48},
(B ){026},
, (C ){02610},
,, (D ){0246810},
,,,, 11.已知集合A={1,2,3,4},B={2,4,6,8},则A
B 中元素的个数为
A .1
B .2
C .3
D . 4
{1
23}A =,,,2{|9}B x x =<A B ={210123}--,
,,,,{21012}--,,,,{123},
,{12},
12.已知集合A={1,2,3,4},B={2,4,6,8},则A B 中元素的个数为
A .1
B .2
C .3
D .4
13.已知集合{|10}A x x =-≥,{0,1,2}B =,则A B =
A .{0}
B .{1}
C .{1,2}
D .{0,1,2}
14.已知集合{1A =-,0,1,2},2{|1}B x x =,则(A
B = )
A .{1-,0,1}
B .{0,1}
C .{1-,1}
D .{0,1,2}
15.若(1)2z i i +=,则(z = ) A .1i -- B .1i -+
C .1i -
D .1i +
16.(1i)(2i)+-= A .3i --
B .3i -+
C .3i -
D .3i +
17.复平面内表示复数(2)z i i =-+的点位于 A .第一象限
B .第二象限
C .第三象限
D .第四象限
18若43i z =+,则||z
z =
(A )1
(B )1-
(C )43+i 55 (D )
43
i 55- 19.已知复数z 满足(1)1z i i -=+,则z =
(A )2i -- (B )2i -+ (C )2i - (D )2i + 20.设
的实部与虚部相等,其中a 为实数,则a=
(A )−3(B )−2(C )2(D )3 21.下列各式的运算结果为纯虚数的是
A .i(1+i)2
B .i 2(1-i)
C .(1+i)2
D .i(1+i)
22.设1i
2i 1i
z -=
++,则z = A .0
B .12
C .1
D
23.设312i
z i -=
+,则||(z = ) A .2 B
C
D .1
24.若a 为实数,且
231ai
i i
+=++,则a = A .-4
B .-3
C .3
D .4
设复数z 满足,则=
(A ) (B ) (C )( D )
i 3i z +=-z 12i -+12i -32i +32i -。