【单选题】y1=interp1(x,y,x1,'linear')是:
【判断题】Li Ming's parents will sponsor Li Ming's traveling.
【简答题】听音填空,完成对话。 Kim: Hello, what's your name? Li Ming: My name is Li Ming. Kim: ____________ ____________ are you? Li Ming: I'm ____________. Kim: ____________ are you ____________? Li Ming: I'm __________...
【简答题】However, the seller also has to Procure insurance against the buyer’s risk of loss or damage to the goods during the carriage.Consequently,the seller contracts for insurance and pays the insurance pre...
【单选题】It is ________ room. They like it very much. [ ]
A.
Li Lei's and Li Ming's
【多选题】设发送端符号为X:x1=0,x2=1;接收端符号为Y:y1=0,y2=1;已知P(x1)=0.55, P(x2)=0.45; P(y1|x1)=P(y2|x2)=0.9, P(y2|x1)=P(y1|x2)=0.1;则下列计算与判断正确的是( )。
A.
P(y1)=P(x1)P(y1|x1)+P(x2)P(y1|x2)=0.55*0.9+0.45*0.1=0.54
B.
P(y2)=P(x1)P(y2|x1)+P(x2)P(y2|x2)=0.55*0.1+0.45*0.9=0.46
C.
P(x1,y1)=P(x1)P(y1|x1)=0.55*0.9=0.495; P(x1|y1)=P(x1,y1)/P(y1)=0.495/0.54=0.917
D.
P(x1,y2)=P(x1)P(y2|x1)=0.55*0.1=0.055; P(x1|y2)=P(x1,y2)/P(y2)=0.055/0.46=0.12
E.
P(x2,y1)=P(x2)P(y1|x2)=0.45*0.1=0.045; P(x2|y1)=P(x2,y1)/P(y1)=0.045/0.54=0.083
F.
P(x2,y2)=P(x2)P(y2|x2)=0.45*0.9=0.405; P(x2|y2)=P(x2,y2)/P(y2)=0.405/0.46=0.88
G.
P(x2|y1)≠P(x1|y2),P(x1|y1)≠P(x2|y2),所以该信道不是对称信道。
【单选题】采用约当产量法进行原材料费用的分配,在产品完工程度可能按工时定额计算的条件是( )。
【单选题】哪种关于“背离”的说法是正确的()?1背离是违反规则;2背离是规则灵活性的体现;3背离是规则所期望的。