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【单选题】
设【图片】和【图片】为相互独立的连续型随机变量，密度函数分别为【图片】和【图片】，分布函数分别为【图片】和【图片】.则（ ）
A.
必为某一随机变量的密度函数.
B.
必为某一随机变量的密度函数.
C.
必为某一随机变量的分布函数.
D.
必为某一随机变量的分布函数.
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参考答案：
举一反三
【单选题】下列估测贴近实际的是( )
A.
课桌的高度大约80 dm
B.
拿起一只鸡蛋所用的力为5 N
C.
一个中学生的质量约为500 g
D.
物理课本重大约2 N
查看完整题目与答案
【单选题】—I knocked over my coffee cup. It went right over ______ keyboard. —You shouldn't put drinks near ______ computer.
A.
the/
B.
the a
C.
a /
D.
a a
查看完整题目与答案
【单选题】－－－ I knocked over my coffee cup. It went righ
A.
26. --- I knocked over my coffee cup. It went rightover ______ keyboard. --- You shouldn’t put drinks near ________ computer.  ( 北京 ) A. the 不填
B.
the a          
C.
a 不填
D.
a a
查看完整题目与答案
【简答题】有网友调侃说：早起，买地沟没炸油条，切个苏丹红咸蛋，上班．中午，在食堂要一瘦肉精肉、炒家药韭菜和双汇香肠，来碗翻新陈米饭，泡壹香精茶叶．下班，买条避孕药鱼，尿素豆芽，膨大西红柿，开瓶甲醇酒，吃个染色馒头．饭后在地摊上买本盗版小说盗版光盘，晚上钻进黑心棉被，哭了… 2012年1月9日山东出现“橡胶鸡蛋”；2012年4月15日，央视《每周质量报告》节目《胶囊里的秘密》，对“非法厂商用皮革下脚料造药用胶...
查看完整题目与答案
【判断题】V字步和A字步都属于低冲击步伐。
A.
正确
B.
错误
查看完整题目与答案
【判断题】V字步不属于低冲击步
A.
正确
B.
错误
查看完整题目与答案
【简答题】For each underlined word or expression, choose the best meaning below. 1. The movement of the train lulled me to sleep. A. forced B. caused C. stopped 2. He has been my associate in several business e...
查看完整题目与答案
【简答题】That family (is, are) a very happy one. 2.The audience (is, are) listening to a Beethoven symphony. 3.The government (is, are) doing its best to boost production. 4.The football team (is, are) being r...
查看完整题目与答案
【简答题】Most research and development projects some element of risk. 2. The government must take action to stop the fighting. 3. Time spent in education is a good of social and economic position. 4. Can ’ t w...
查看完整题目与答案
【简答题】Which of these statements do you think are true? Write T (true) or F (false). Discuss your answers with a partner. 1. Most casual counterfeiters make millions of dollars in bills. 2. The government is...
查看完整题目与答案
相关题目：
【单选题】下列估测贴近实际的是( )
A.
课桌的高度大约80 dm
B.
拿起一只鸡蛋所用的力为5 N
C.
一个中学生的质量约为500 g
D.
物理课本重大约2 N
查看完整题目与答案
【单选题】—I knocked over my coffee cup. It went right over ______ keyboard. —You shouldn't put drinks near ______ computer.
A.
the/
B.
the a
C.
a /
D.
a a
查看完整题目与答案
【单选题】－－－ I knocked over my coffee cup. It went righ
A.
26. --- I knocked over my coffee cup. It went rightover ______ keyboard. --- You shouldn’t put drinks near ________ computer.  ( 北京 ) A. the 不填
B.
the a          
C.
a 不填
D.
a a
查看完整题目与答案
【简答题】有网友调侃说：早起，买地沟没炸油条，切个苏丹红咸蛋，上班．中午，在食堂要一瘦肉精肉、炒家药韭菜和双汇香肠，来碗翻新陈米饭，泡壹香精茶叶．下班，买条避孕药鱼，尿素豆芽，膨大西红柿，开瓶甲醇酒，吃个染色馒头．饭后在地摊上买本盗版小说盗版光盘，晚上钻进黑心棉被，哭了… 2012年1月9日山东出现“橡胶鸡蛋”；2012年4月15日，央视《每周质量报告》节目《胶囊里的秘密》，对“非法厂商用皮革下脚料造药用胶...
查看完整题目与答案
【判断题】V字步和A字步都属于低冲击步伐。
A.
正确
B.
错误
查看完整题目与答案
【判断题】V字步不属于低冲击步
A.
正确
B.
错误
查看完整题目与答案
【简答题】For each underlined word or expression, choose the best meaning below. 1. The movement of the train lulled me to sleep. A. forced B. caused C. stopped 2. He has been my associate in several business e...
查看完整题目与答案
【简答题】That family (is, are) a very happy one. 2.The audience (is, are) listening to a Beethoven symphony. 3.The government (is, are) doing its best to boost production. 4.The football team (is, are) being r...
查看完整题目与答案
【简答题】Most research and development projects some element of risk. 2. The government must take action to stop the fighting. 3. Time spent in education is a good of social and economic position. 4. Can ’ t w...
查看完整题目与答案
【简答题】Which of these statements do you think are true? Write T (true) or F (false). Discuss your answers with a partner. 1. Most casual counterfeiters make millions of dollars in bills. 2. The government is...
查看完整题目与答案
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