【单选题】【消耗次数：1】
设A={1，2，3，4，5}，B={6，7，8，9，10}，以下关系是从A到B的入射函数的是（ ）
①
f={1,83,94,102,65,7}
②
f={1,72,64,81,95,10}
③
f={1,62,74,93,8}
④
f={1,105,93,64,62,8}
参考答案：
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0.5
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②
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③
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②
<img src=https://huaweicloudobs.ahjxjy.cn/CA5056F99EC79B715D8AEB3227F19B66.png title=34-2.png alt=34-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/40E1EFC99C4CC45D4A659428DC3D3606.png title=34-3.png alt=34-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/7380068D4B77F4F6899016B090472892.png title=34-4.png alt=34-4.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/1F19C313DAE19F506EB8C34E124A261D.png title=29.png alt=29.png/>
①
53
②
12
③
-26
④
15
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/29526C054986D076E2AC23D1FD6A476C.png title=36.png alt=36.png/>
①
1
②
7
③
10
④
8
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/7DEA14CE0F84FA54BD377B031AA7FBA1.png title=33.png alt=33.png/>
①
4
②
-4
③
6
④
-6
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/193AF75E6BF3E97DDBE6113A2A84119F.png title=22.png alt=22.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/9065909C56E40292C30BCD87523816F6.png title=22-1.png alt=22-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/B47853DCBAD65C09F52B982F3335D934.png title=22-2.png alt=22-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/F76A760AF9FCAC0556AA6A3CB81189BA.png title=22-3.png alt=22-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/68E7881C5853BFD96C0256C437334DAB.png title=22-4.png alt=22-4.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/AD8F1B90507E6A6E7CE3AAD68C6C7311.png title=9.png alt=9.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/60FB423E97E65B79BA0C21627D367ADA.png title=9-1.png alt=9-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/BC33ADBB1658156D16B02D9FE6FC53E8.png title=9-2.png alt=9-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/8D2E031F792CEC30EFCFEDA2FD37CE92.png title=9-3.png alt=9-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/B710EEB750B5C91852B8818575A3F177.png title=9-4.png alt=9-4.png/>