设总体X服从[img=71x27]180318be4d88e36.png[/img]，总体Y服从[img=71x27]180318be5661edd.png[/img]，[img=92x23]180318be5f021f3.png[/img]与[img=84x23]180318be66f167d.png[/img]分别来自总体X和Y的简单随机样本。[img=11x14]180318be6f364c9.png[/img]未知，显著性水平为a。则[img=218x23]180318be77fe1a3.png[/img]的拒绝域为（） A: [img=238x67]180318be84bf862.png[/img] B: [img=269x67]180318be8f36cbd.png[/img] C: [img=269x67]180318be9adee49.png[/img] D: [img=269x67]180318bea5ed425.png[/img]

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2022-06-26 问题

设总体X服从[img=71x27]180318be4d88e36.png[/img]，总体Y服从[img=71x27]180318be5661edd.png[/img]，[img=92x23]180318be5f021f3.png[/img]与[img=84x23]180318be66f167d.png[/img]分别来自总体X和Y的简单随机样本。[img=11x14]180318be6f364c9.png[/img]未知，显著性水平为a。则[img=218x23]180318be77fe1a3.png[/img]的拒绝域为（） A: [img=238x67]180318be84bf862.png[/img] B: [img=269x67]180318be8f36cbd.png[/img] C: [img=269x67]180318be9adee49.png[/img] D: [img=269x67]180318bea5ed425.png[/img]

2022-06-12 问题

When was Valentine supposedly executed? A: This was on February 14, 269 A.D.. B: This was on March 14, 269 A.D.. C: This was on July 7, 269 A.D.. D: This was on January 14, 269 A.D..

2022-06-09 问题

When was Valentine supposedly executed? A: This was on February 14, 269 A.D.. B: This was on March 14, 269 A.D.. C: This was on July 7, 269 A.D.. D: This was on January 14, 269 A.D..

已知 x = ‘67’ 和 y = ‘89’,那么表达式 x + y 的值为____。

哈雷X的机身厚度是（）mm。 A: 66 B: 77 C: 88 D: 67

对于下面的for循环语句，可以断定它执行________次循环。 for(x=1,y=1;(y!=67)&&(x<5);x++) printf("*");

十进制数269转换成十六进制数是

十进制数269转换成十六进制数是

十进制数269转换成十六进制数是

十进制数269转换成十六进制数是

十进制数269转换成十六进制数是