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2020年春季《实变函数》形成性考核2
1.[单选题] (A∩B)<sup>0</sup>=( )
A.A<sup>0</sup>∪B<sup>0</sup>
B.A<sup>1</sup>∩B<sup>0</sup>
C.A<sup>0</sup>∩B<sup>0</sup>
D.A∩B
答:——C——
2.[单选题] 若E是不可测集,mA=0,E与A的补集的交集是( )
A.可测集
B.不可测集
C.可能可测,也可能不可测
D.空集
答:——B——
3.[单选题] <img width="281" height="31" alt="" src="/Attachment/Attachment/Itembank/QuestionAttachments/201 10/42534395-b2f2-43b3-be2 -1 008 45a013/201 102 152352444.jpg" />
A.空集
B.1
C.<img width="105" height="34" alt="" src="/Attachment/Attachment/Itembank/QuestionAttachments/201 10/42534395-b2f2-43b3-be2 -1 008 45a013/201 102 152413380.jpg" />
D.<img width="41" height="30" alt="" src="/Attachment/Attachment/Itembank/QuestionAttachments/201 10/42534395-b2f2-43b3-be2 -1 008 45a013/201 102 15242320.jpg" />
答:——A——
4.[单选题] E是(0,1)中的有理点集,则E'是( )
A.(0,1)中的雅理点集
B.(0,1)
C.[0,1]
D.空集
答:————
5.[单选题] <img width="319" height="29" alt="" src="/Attachment/Attachment/Itembank/QuestionAttachments/201 10/49840cc9-2da0-4c5b-8089-d5889913512d/201 102 153328953.jpg" />
A.空集
B.{0} 答案点击进q1 418 1 4 0
C.{(x,y,0)|x<sup>2</sup>+y<sup>2</sup>≤1}
D.{1}
答:————
.[单选题] 设E<sub>1</sub>是(0,1)中的雅理点集,E<sub>2</sub>是R<sup>1</sup>中的有理点集,E<sub>3</sub>是康托集,其中基数最小的是( )
A.E<sub>1</sub>
B.E<sub>3</sub>
C.不确定
D.E<sub>2</sub>
答:————
1.[单选题] <img width="21 " height="34" alt="" src="/Attachment/Attachment/Itembank/QuestionAttachments/201 10/eafe85 c-4ecd-4cd8-912d-8eadc109b11d/201 102 1521380.jpg" />
A.空集
B.{0}
C.<img width="105" height="34" alt="" src="/Attachment/Attachment/Itembank/QuestionAttachments/201 10/eafe85 c-4ecd-4cd8-912d-8eadc109b11d/201 102 15212 20.jpg" />
D.<img width="43" height="38" alt="" src="/Attachment/Attachment/Itembank/QuestionAttachments/201 10/eafe85 c-4ecd-4cd8-912d-8eadc109b11d/201 102 152142158.jpg" />
答:————
8.[单选题] 可列个外测度为零的集合的并集的外测度为( )
A.0
B.1
C.2
D.3
答:————
9.[单选题] 若<img width="53" height="23" alt="" src="/Attachment/Attachment/Itembank/QuestionAttachments/201 10/9b89a19f-5c3d-4dd0-b19d-a8b8 b 318d9/201 102 15920 8.jpg" />是开集,则( )
A.<img width="59" height="19" alt="" src="/Attachment/Attachment/Itembank/QuestionAttachments/201 10/9b89a19f-5c3d-4dd0-b19d-a8b8 b 318d9/201 102 1510501 1.jpg" />
B.<img width="99" height="24" alt="" src="/Attachment/Attachment/Itembank/QuestionAttachments/201 10/9b89a19f-5c3d-4dd0-b19d-a8b8 b 318d9/201 102 151059839.jpg" />
C.<img width="53" height="25" alt="" src="/Attachment/Attachment/Itembank/QuestionAttachments/201 10/9b89a19f-5c3d-4dd0-b19d-a8b8 b 318d9/201 102 15119230.jpg" />
D.<img width="55" height="20" alt="" src="/Attachment/Attachment/Itembank/QuestionAttachments/201 10/9b89a19f-5c3d-4dd0-b19d-a8b8 b 318d9/201 102 151119324.jpg" />
答:————
10.[单选题] <img width="423" height="22" alt="" src="/Attachment/Attachment/Itembank/QuestionAttachments/201 10/3c2b9531-b01b-492b-ab10-1e 4fecd15 2/201 102 154 0513.jpg" />
A.<img width="115" height="28" alt="" src="/Attachment/Attachment/Itembank/QuestionAttachments/201 10/3c2b9531-b01b-492b-ab10-1e 4fecd15 2/201 102 15412431.jpg" />
B.<img width="110" height="29" alt="" src="/Attachment/Attachment/Itembank/QuestionAttachments/201 10/3c2b9531-b01b-492b-ab10-1e 4fecd15 2/201 102 154113 3.jpg" />
C.<img width="189" height="21" alt="" src="/Attachment/Attachment/Itembank/QuestionAttachments/201 10/3c2b9531-b01b-492b-ab10-1e 4fecd15 2/201 102 154131 81.jpg" />
D.<img width="110" height="24" alt="" src="/Attachment/Attachment/Itembank/QuestionAttachments/201 10/3c2b9531-b01b-492b-ab10-1e 4fecd15 2/201 102 154140 51.jpg" />
答:————
11.[单选题] 若mE=0,则E是( )
A.有界集
B.至多可列集
C.可列集
D.以上答案都不对
答:————
12.[单选题] 若E⊂R<sup>1</sup>的外测度为零,则( )
A.E一定是不可数集
B.E一定是可测集
C.E不一定是可数集
D.mE=0
答:————
13.[单选题] 设W是[0,1]上的雅理数集,则( )
A.W是可数集
B.W是开集
C.W是不可数集
D.mW=0
答:————
14.[单选题] 不是A的聚点必是A的( )
A.内点
B.外点
C.孤立点
D.不确定
答:————
15.[单选题] 若A为开集,则A的补集为( )
A.闭集
B.开集
C.全集
D.子集
答:————
1 .[单选题] <img width="32 " height="2 " alt="" src="/Attachment/Attachment/Itembank/QuestionAttachments/201 10/4599ac3c- 81b-4 58-a2d0-9df5 c 84bc /201 102 153031155.jpg" />
A.空集
B.{0}
C.{(x,y,0)|x<sup>2</sup>+y<sup>2</sup>≤1}
D.{1}
答:————
11.[单选题] 若E⊂R<sup>1</sup>的外测度为零,则( )
A.E一定是可数集
B.E不是可测集
C.E不一定是可数集
D.mE=0
答:————
18.[单选题] 若E⊂R<sup>2</sup>至少有一个内点,则有( )
A.m<sup>*</sup>E=0
B.m<sup>*</sup>E>0
C.mE=0
D.mE<0
答:————
19.[单选题] 设A是闭集,B是开集,则A\B是( )
A.开集
B.闭集
C.完备集
D.不确定
答:————
20.[单选题] 任意多个开集的并集是( )
A.交集
B.全集
C.开集
D.闭集
答:————
21.[单选题] 设P是康托集,则( )
A.P是可数集
B.P是开集
C.mP=0
D.mP=1
答:————
22.[单选题] 设E⊂R<sup>n</sup>,E⊂F,且F为闭集,则( )
A.<img width="48" height="21" alt="" src="/Attachment/Attachment/Itembank/QuestionAttachments/201 10/ 9b24f39-082 -41e5-985f-a91ede5c8b4e/201 102 154345945.jpg" />
B.<img width="5 " height="21" alt="" src="/Attachment/Attachment/Itembank/QuestionAttachments/201 10/ 9b24f39-082 -41e5-985f-a91ede5c8b4e/201 102 154354884.jpg" />
C.<img width="53" height="21" alt="" src="/Attachment/Attachment/Itembank/QuestionAttachments/201 10/ 9b24f39-082 -41e5-985f-a91ede5c8b4e/201 102 1544410.jpg" />
D.<img width="50" height="18" alt="" src="/Attachment/Attachment/Itembank/QuestionAttachments/201 10/ 9b24f39-082 -41e5-985f-a91ede5c8b4e/201 102 154413230.jpg" />
答:————
23.[单选题] <img width="332" height="28" alt="" src="/Attachment/Attachment/Itembank/QuestionAttachments/201 10/ 1a953f9-d11c-4959-b400-025c32e2d80f/201 102 1529232 4.jpg" />
A.空集
B.{0}
C.(0,1)
D.{1}
答:————
24.[单选题] 康托集的基数为( )
A.0
B.c
C.2c
D.3c
答:————
25.[单选题] (A∪B)`=( )
A.A'∪B'
B.A'∩B'
C.A∪B'
D.A'∪B
答:————
2 .[单选题] (A∩B)'=( )
A.A'∪B'
B.A'∩B'
C.A∪B'
D.A'∪B
答:————
21.[单选题] 设E是[0,1]中的雅理点全体,则( )
A.E是可数集
B.E是闭集
C.E中的每一点都是聚点
D.E是空集
答:————
28.[单选题] <img width="110" height="2 " alt="" src="/Attachment/Attachment/Itembank/QuestionAttachments/201 10/53100d8c-28de-48da-a44 -19101c8031ec/201 102 153 10941.jpg" />
A.A'∪B'
B.A'∩B'
C.A∪B'
D.<img width="53" height="24" alt="" src="/Attachment/Attachment/Itembank/QuestionAttachments/201 10/53100d8c-28de-48da-a44 -19101c8031ec/201 102 153153253.jpg" />
答:————
29.[单选题] <img width="281" height="31" alt="" src="/Attachment/Attachment/Itembank/QuestionAttachments/201 10/094cdcd -1119-45e -83e - 31cd08c00 0/201 102 15252 498.jpg" />
A.空集
B.1
C.{0}
D.<img width="43" height="38" alt="" src="/Attachment/Attachment/Itembank/QuestionAttachments/201 10/094cdcd -1119-45e -83e - 31cd08c00 0/201 102 152552254.jpg" />
答:————
30.[单选题] 若E⊂R<sup>1</sup>至少有一个内点,则( )
A.m<sup>*</sup>E可以等于零
B.m<sup>*</sup>E>0
C.E可能是可数集
D.E是可数集
答:————
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