皮皮学，免费搜题
登录
搜题
【单选题】
安装压力表时,以螺纹不松动、不渗漏为准,不要过分用力,防止憋压打坏()
A.
引压阀
B.
弹簧管
C.
表盘
D.
表针
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
.
..
皮皮学刷刷变学霸
举一反三
【单选题】已知随机变量x,y的方差分别为dx=2,dy=1 且协方差cov(x,y)=0.6 ,则d(x-y)=().
A.
4
B.
3
C.
2
D.
1.8
查看完整题目与答案
【简答题】The price quoted by a Shanghai exporter was " USD 1200 per M/T CFR Liverpool". The buyer requested a revised FOB price including 2% commission. The freight for Shanghai -Liverpool was USD200 per M/T. ...
查看完整题目与答案
【判断题】cov(X,X)=DX。
A.
正确
B.
错误
查看完整题目与答案
【简答题】The price quoted by a Shanghai exporter was "USD1200 per M/T CFR Liverpool". The buyer requested a revised FOB price including 2% commission. The freight for Shanghai-Liverpool was USD200 per M/T. To ...
查看完整题目与答案
【单选题】孙中山提出的五权是在三权分立的基础上增加了()。
A.
督查权
B.
立法权
C.
司法权
D.
考选权
查看完整题目与答案
【单选题】我国刑法理论上称之为绝对无刑事责任时期是指不满（）
A.
75周岁
B.
18周岁
C.
16周岁
D.
14周岁
查看完整题目与答案
【简答题】The price quoted by an exporter was "USD450 per case FOB Shanghai". The importer requested a revised quote for CIF Auckland. If the freight was USD50 per case, 110% of the value was to be insured, and...
查看完整题目与答案
【单选题】7假设x =((1,2),(3,4,5),(5,6,5,9)),len(x)和len(x [0])?
A.
2和1
B.
2和2
C.
3和2
D.
2和3
E.
3和3
查看完整题目与答案
【简答题】设随机变量X，Y满足DX=2,DY=3,Cov(X,Y)=-1,则Cov(3X-2Y+1,X+4Y-3)=____.
查看完整题目与答案
【单选题】孙中山提出的五权是在三权分立的基础上增加了( )。
A.
行政权
B.
立法权
C.
司法权
D.
考试权
查看完整题目与答案
相关题目：
【单选题】已知随机变量x,y的方差分别为dx=2,dy=1 且协方差cov(x,y)=0.6 ,则d(x-y)=().
A.
4
B.
3
C.
2
D.
1.8
查看完整题目与答案
【简答题】The price quoted by a Shanghai exporter was " USD 1200 per M/T CFR Liverpool". The buyer requested a revised FOB price including 2% commission. The freight for Shanghai -Liverpool was USD200 per M/T. ...
查看完整题目与答案
【判断题】cov(X,X)=DX。
A.
正确
B.
错误
查看完整题目与答案
【简答题】The price quoted by a Shanghai exporter was "USD1200 per M/T CFR Liverpool". The buyer requested a revised FOB price including 2% commission. The freight for Shanghai-Liverpool was USD200 per M/T. To ...
查看完整题目与答案
【单选题】孙中山提出的五权是在三权分立的基础上增加了()。
A.
督查权
B.
立法权
C.
司法权
D.
考选权
查看完整题目与答案
【单选题】我国刑法理论上称之为绝对无刑事责任时期是指不满（）
A.
75周岁
B.
18周岁
C.
16周岁
D.
14周岁
查看完整题目与答案
【简答题】The price quoted by an exporter was "USD450 per case FOB Shanghai". The importer requested a revised quote for CIF Auckland. If the freight was USD50 per case, 110% of the value was to be insured, and...
查看完整题目与答案
【单选题】7假设x =((1,2),(3,4,5),(5,6,5,9)),len(x)和len(x [0])?
A.
2和1
B.
2和2
C.
3和2
D.
2和3
E.
3和3
查看完整题目与答案
【简答题】设随机变量X，Y满足DX=2,DY=3,Cov(X,Y)=-1,则Cov(3X-2Y+1,X+4Y-3)=____.
查看完整题目与答案
【单选题】孙中山提出的五权是在三权分立的基础上增加了( )。
A.
行政权
B.
立法权
C.
司法权
D.
考试权
查看完整题目与答案