首页
>
学历类
>
自考
> 自考专业(国贸)试题列表
全部
国际运输与保险
国际技术贸易
国际贸易
国际贸易实务(一)
国际商法
国际商务英语
基础英语
企业会计学
涉外经济法
世界市场行情
外经贸经营与管理
外刊经贸知识选读
外贸英语写作
概率论与数理统计经管类
线性代数(经管类)
自考专业(国贸)试题列表
设袋内有5个红球、3个白球和2个黑球,从袋中任取3个球,则恰好取到1个红球、1个白球和1个黑球的概率为_________.
设随机事件A与B相互独立,且P(A)=P(B)=1/3,则[img src="https://img.haodaxue.net/uploadimg/image/20200609/20200609170347_44148.png" alt="" />=_______.
设 x1,x2,x3,x4 为来自总体X的样本,[img src="https://img.haodaxue.net/uploadimg/image/20200609/20200609170138_39209.png" alt="" />=()
设随机变量Zn~B(n,p),n=1,2,其中0<p<1,[img src="https://img.haodaxue.net/uploadimg/image/20200609/20200609165937_50596.png" alt="" />=()
设随机变量X与Y相互独立,且X~B(16,0.5),Y服从参数为9的泊松分布,则D(X-2Y+3)=()
已知随机变量 X的概率密度为f(x)=[img src="https://img.haodaxue.net/uploadimg/image/20200609/20200609165623_70816.png" alt="" />则E(X)=()
设二维随机变量( X,Y)~ N(μ1, μ2,),则 Y ~()
设下列函数的定义域均为(-∞,+∞),则其中可作为概率密度的是()
设随机变量 X的概率密度为 f(x)=[img src="https://img.haodaxue.net/uploadimg/image/20200609/20200609165136_42532.png" alt="" />则常数c=()
设随机变量X的概率密度为f(x)=[img src="https://img.haodaxue.net/uploadimg/image/20200609/20200609164938_22484.png" alt="" />则P{0≤X≤}=()
设随机变量X~N(1,4),F(x)为X的分布函数,Φ(x)为标准正态分布函数,则F(3)=()
设随机事件A与B互不相容,且P(A)>0,P(B)>0,则()
Will it be_____ before the professor returns ?
—Would you mind my sitting here ?[br] — ______ .
Only 5 _____ of the population of America _____ farmers .
I'm sorry I've forgotten to post your letter .[br] —Never mind . _____ post it myself .
The baby always sleeps with his eyes half_____ .
Generally , the weather in Britain is_____ too cold in winter _____ too hot in summer .
—Why have you changed so much ?[br] —You don't know I ______ a hard life in the last ten years .
—What's the young man?[br] —______ .
There are many islands______ the coast of China.
_____ of the two brothers would like to take _____ of the two apples on the table .
______ progress you have make this term!
_____ seen ,it will never be forgotten.
I'll never do ______ .
The progress he has made in maths is much greater than ______ in English .
Although Linda tried hard in the exam ,she did ______ than her brother .
In the end I ______ a good effort to pass the examination .
I ______ going for a walk after supper . Do you want to go together with me ?
The shoes are made in Wuxi City , ______ is famous for it's products of light industry .
How long did the concert ______ ?
Our country is no longer what it _____.
Pop music is _____ he likes most .
The Great Wall in China is one of the few _____ objects on the earth _____ from the moon .
—Is there anything else I can do for you ?[br] — ______ .
The teacher asked the children_____ they_____ the things in the lad that morning .
—What's your new classmate like ?[br] —He is______
—What's the weather going to be like at the weekend ?[br] — ______ .
You should grow different plants in_____ same field _____ each ether .
You'd better stop doing the job if it goes______ your will .
第一页
上一页
1
2
3
4
5
下一页