总体分布正态，总体方差[tex=1.0x1.286]Rx0l9lkKLR0hsh9BQCKuow==[/tex]已知时，从总体中随机抽取容量为25的小样本，用样本平均数估计总体平均数的置信区间为 未知类型：{'options': ['[tex=13.5x2.429]jxozUzS2rBgTg/pd6AP5walWq2i+GtcIpl+AH9VQgkMGG6R8CGPJ5U7Fu+Jarjt+LooagvhadQrvrI/J4dmKn6ORncRY+0d3x2aVH72qZAg+84kyw+b9UmYVDLEHmfxD[/tex]', '[tex=12.857x2.429]d08/1m3BSdpcStZi4ycJqraq1sgT5Yna8bzTqfa198n4xE0CnX2UcmnJLPSOuuPrAyCXHCiXfJSfdtqe/Ik7kOUtVombsb+cGQEYJliiTiETyu3cHGfhaQTX2RGyb3Mb[/tex]', '[tex=16.071x2.429]jxozUzS2rBgTg/pd6AP5walWq2i+GtcIpl+AH9VQgkOH8tHzWRZRCmrsZPY5lgj57lUp++hLgB5zQ/Dn59gCfcUldu/46ohQ9r0B90q4QTbKmJpTJ4nswHvFqxc9ZDqd[/tex]', '[tex=15.429x2.429]d08/1m3BSdpcStZi4ycJqraq1sgT5Yna8bzTqfa198m15jwH2O3Ma18RK8xeZ8osNljjtiR2a6joRlMKLlinCmYUeM2/WkFE3z4ZYpzNdtMz1OCH6bjsdYabZEYQpjcm[/tex]'], 'type': 102}

总体分布正态，总体方差[tex=1.0x1.286]Rx0l9lkKLR0hsh9BQCKuow==[/tex]已知时，从总体中随机抽取容量为25的小样本，用样本平均数估计总体平均数的置信区间为 未知类型：{'options': ['[tex=13.5x2.429]jxozUzS2rBgTg/pd6AP5walWq2i+GtcIpl+AH9VQgkMGG6R8CGPJ5U7Fu+Jarjt+LooagvhadQrvrI/J4dmKn6ORncRY+0d3x2aVH72qZAg+84kyw+b9UmYVDLEHmfxD[/tex]', '[tex=12.857x2.429]d08/1m3BSdpcStZi4ycJqraq1sgT5Yna8bzTqfa198n4xE0CnX2UcmnJLPSOuuPrAyCXHCiXfJSfdtqe/Ik7kOUtVombsb+cGQEYJliiTiETyu3cHGfhaQTX2RGyb3Mb[/tex]', '[tex=16.071x2.429]jxozUzS2rBgTg/pd6AP5walWq2i+GtcIpl+AH9VQgkOH8tHzWRZRCmrsZPY5lgj57lUp++hLgB5zQ/Dn59gCfcUldu/46ohQ9r0B90q4QTbKmJpTJ4nswHvFqxc9ZDqd[/tex]', '[tex=15.429x2.429]d08/1m3BSdpcStZi4ycJqraq1sgT5Yna8bzTqfa198m15jwH2O3Ma18RK8xeZ8osNljjtiR2a6joRlMKLlinCmYUeM2/WkFE3z4ZYpzNdtMz1OCH6bjsdYabZEYQpjcm[/tex]'], 'type': 102}

总体分布正态，总体方差[tex=1.0x1.286]Rx0l9lkKLR0hsh9BQCKuow==[/tex]已知时，从总体中随机抽取容量为25的小样本，用样本平均数估计总体平均数的置信区间为 未知类型：{'options': ['[tex=13.5x2.429]jxozUzS2rBgTg/pd6AP5walWq2i+GtcIpl+AH9VQgkMGG6R8CGPJ5U7Fu+Jarjt+LooagvhadQrvrI/J4dmKn6ORncRY+0d3x2aVH72qZAg+84kyw+b9UmYVDLEHmfxD[/tex]', '[tex=12.857x2.429]d08/1m3BSdpcStZi4ycJqraq1sgT5Yna8bzTqfa198n4xE0CnX2UcmnJLPSOuuPrAyCXHCiXfJSfdtqe/Ik7kOUtVombsb+cGQEYJliiTiETyu3cHGfhaQTX2RGyb3Mb[/tex]', '[tex=16.071x2.429]jxozUzS2rBgTg/pd6AP5walWq2i+GtcIpl+AH9VQgkOH8tHzWRZRCmrsZPY5lgj57lUp++hLgB5zQ/Dn59gCfcUldu/46ohQ9r0B90q4QTbKmJpTJ4nswHvFqxc9ZDqd[/tex]', '[tex=15.429x2.429]d08/1m3BSdpcStZi4ycJqraq1sgT5Yna8bzTqfa198m15jwH2O3Ma18RK8xeZ8osNljjtiR2a6joRlMKLlinCmYUeM2/WkFE3z4ZYpzNdtMz1OCH6bjsdYabZEYQpjcm[/tex]'], 'type': 102}

总体分布正态，总体方差[tex=1.0x1.286]Rx0l9lkKLR0hsh9BQCKuow==[/tex]已知时，从总体中随机抽取容量为25的小样本，用样本平均数估计总体平均数的置信区间为 未知类型：{'options': ['[tex=13.5x2.429]jxozUzS2rBgTg/pd6AP5walWq2i+GtcIpl+AH9VQgkMGG6R8CGPJ5U7Fu+Jarjt+LooagvhadQrvrI/J4dmKn6ORncRY+0d3x2aVH72qZAg+84kyw+b9UmYVDLEHmfxD[/tex]', '[tex=12.857x2.429]d08/1m3BSdpcStZi4ycJqraq1sgT5Yna8bzTqfa198n4xE0CnX2UcmnJLPSOuuPrAyCXHCiXfJSfdtqe/Ik7kOUtVombsb+cGQEYJliiTiETyu3cHGfhaQTX2RGyb3Mb[/tex]', '[tex=16.071x2.429]jxozUzS2rBgTg/pd6AP5walWq2i+GtcIpl+AH9VQgkOH8tHzWRZRCmrsZPY5lgj57lUp++hLgB5zQ/Dn59gCfcUldu/46ohQ9r0B90q4QTbKmJpTJ4nswHvFqxc9ZDqd[/tex]', '[tex=15.429x2.429]d08/1m3BSdpcStZi4ycJqraq1sgT5Yna8bzTqfa198m15jwH2O3Ma18RK8xeZ8osNljjtiR2a6joRlMKLlinCmYUeM2/WkFE3z4ZYpzNdtMz1OCH6bjsdYabZEYQpjcm[/tex]'], 'type': 102}

【单选题】NO 2 、NO 2 - 、NO 2 + 键角大小关系正确的是 。 A. NO 2 > NO 2 - >NO 2 + B. NO 2 + >NO 2 >NO 2 - C. NO 2 - > NO 2 >NO 2 + D. NO 2 + > NO 2 - >NO 2

求定积分[img=179x43]17da65388c0b1ca.png[/img]； （ ） A: log(2^(1/2) + 1)/2 + 2^(1/2)/2 B: log(2^(1/2) + 1)/2 - 2^(1/2)/2 - 1/2 C: log(2^(1/2) + 1)/2 + 2^(1/2)/2 - 1/2 D: log(2^(1/2) + 1)/2 + 2^(1/2)/2 + 1/2

2 + 2 * (2 * 2 - 2) % 2 / 3

函数z=xsiny在点(1,π/4)处的两个偏导数分别为 A: √2/2,√2/2 B: √2/2,-√2/2 C: -√2/2,-√2/2 D: -√2/2,√2/2

2×2×2×2×2

HbF的构成主要是（） A: α2β2 B: α2δ2 C: ζ2ε2 D: α2γ2 E: ζ2γ2