更多"[单选题]创建两个集合s1 = set('abc'); s2 = se"的相关试题:
[单选题]7
下列命题:①空集没有子集;②任何集合至少有两个子集;③空集是任何集合的真子集;④若∅真包含于集合A,则A≠∅. 其中正确的有( )
A. 0个
B. 1个
C. 2个
D. 3个
[判断题]4.101.
BCD码为用二进制编码的十进制数,常用的BCD码为8421BCD。
A.正确
B.错误
[单选题] 下列命题:①空集没有子集;②任何集合至少有两个子集;③空集是任何集合的子集;④若∅真包含于集合A,则A≠∅.其中正确的有( )
A.0个
B.1个
C.2个
D.3个
[单选题]3 下列命题:①空集没有子集;②任何集合至少有两个子集;③空集是任何集合的子集;④若∅真包含于集合A,则A≠∅. 其中正确的有( )
A. 0个
B. 1个
C. 2个
D. 3个
[单选题] 下列命题:①空集没有子集;②任何集合至少有两个子集;③空集是任何集合的真子集;④若∅真包含于集合A,则A≠∅.其中正确的有( )
A.0个
B.1个
C.2个
D.3个
[单选题]KU MODEM 板子板上有两个拨动开关组,其中S1的第( ) 个位置是发单载波( )CW和连续调制波( )Super Burst的控制开关。
A.5
B.6
C.7
D.8
[单选题]设S1、S2分别为被保护设备及某避雷器的伏秒特性曲线,要使设备受到可靠保护必须S2()S1。
A.低于
B.高于
C.等于
D.不高于
[多选题] 多选题 保险风险的集合与分散必须具有的两个前提是()。
A.大量的风险
B.不同质风险
C.同质风险
D.可转移的风险
[单选题]S1:Shall we begin now? S2:OK. S1:First, let me check the Bill of Health? S2:Of course, here you are. S1:As I know, there was epidemic in your last port of call. Were you all inoculated against it? S2:Yes, we were. Here are the inoculation papers. S1:Good. Are there any patients on board at present? S2:No. All of us are in good health. S1:All right. Have you set rat guards and traps on the moorings? S2:Yes, we have when the ship is alongside. 问题 1:What’s the probable relationship between the two speakers?( )
A. A customs officer and a captain.
B. An immigration officer and a captain.
C. A pilot and a captain.
D. Aquarantine officer and a captain.
[简答题]S1线无线AP箱采用 布点方式,即空区内两个信道的AP箱依次交叉布置。
[简答题]如图所示,已知电动势E=8.V,内阻r0=1Ω,电阻r1=r2=r3=2Ω。S1、S2、S3同时接通时,输出电压U=______V。
教师详解:
[单选题]八选一数据选择器当选择码S2,S1,S0为1,1,0时()。
A.选择数据从Y3输出
B.选择数据从I3输出
C.选择数据从Y6输出
D.选择数据从I6输出
[单选题]BCD码是一种数字编码,常用()位二进制
表示一位BCD码.
A.A:4
B.B:8
C.C:7
D.D:1
[单选题]( )S1:OK. What about meat? S2: Let' s see? enough for 30 days of 20 men' s consumption onboard So that' s 50 kIlos of frozen chicken and 100 kilos of fish. Q:How many crewmembers are there onboard?
A.20
B.30
C.50
D.100
[单选题]( )S1: What’s the matter with you? S2:I’ve got a headache and a sore throat. Sometimes I feel cold.Q: Which is not mentioned in the conversation?
A.A headache
B.A cough
C.A sore throat
D.A cold