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单选题 1.已知随机变量X与Y相互独立,且均服从于标准正态分布,则随机变量Z=X+Y服从于( )分布
学科：默认课程
时间：2026-05-20 08:31:02
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题目1单选题
现在的年轻人都喜欢上网冲浪,获取各种信 息A. Nowadays, young people like to surfing the net to get all kinds of informationB. Nowadays, young people like to surf the net to get all kinds of informationC. Nowadays, young people like to rush the wave to get all kinds of informationD. Nowadays, young people like to surface the net to get all kinds of information
题目2单选题
网络是一个大家可以聊天交流的好地方A. The Internet is a good place where people can chat and change ideasB. The Internet is a good place that people can chat and exchange ideasC. The Internet is a good place which people can chat and exchange ideasD. The Internet is a good place where people can chat and exchange ideas
题目3单选题
这些天来,我一直都在为我的论文寻找资料A. These days I have look for materials for my paperB. These days I looking for materials for my paperC. These days I have been looking for materials for my paperD. These days I am looked for materials for my paper
题目4单选题
每年人们都举行各种活动庆祝元旦A. Every year, people organize various activities to celebrate New Year's DayB. Every year, people organize various activities to celebrated New Year's DayC. Every year, people organize various activities to celebrity New Year's DayD. Every year, people organize various activities to celebrating Spring Festival
题目5单选题
他每件事情都要自己独立做A. He do everything at his ownB. He does everything for his ownerC. He does everything on his ownD. He doing everything on his own
题目6单选题
1.已知随机变量X与Y相互独立,且均服从于标准正态分布,则随机变量Z=X+Y服从于( )分布A. N(0,1)B. N(0,2)C. N(1,2)D. 不确定
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