【简答题】已知矩阵 的行列式值为0,求 ____.
【多选题】关于泌尿系统,以下说法正确的是
D.
泌尿系统主要功能是排出机体代谢产生的所有废物和多余水分
【简答题】()是最大的民生。 A创新 B治理 C就业 D法律
【单选题】以下泌尿系统的组成及功能哪个是错误的( )。
【单选题】Draw a map of supply and demand in an importingcountry. Before trade is allowed, what is the surplus of consumers and producers?
A.
before trade is allowed, consumer surplus is areaA, producer surplus is areaB + C
B.
before trade is allowed,consumer surplus is areaA producer surplus is areaB + D
【简答题】设矩阵 ,其行列式|A|=-1,又A的伴随矩阵A*有一个特征值λ0,属于λ0的一个特征向量为α=(-1,-1,1),求a,b,c和λ0的值.
【单选题】Draw a map of supply and demand in an importingcountry. What is the surplus of consumers and producers when there is free trade?
A.
consumer surplus is area A + B + D producer surplus is areaC
B.
consumer surplus is area B+C + D producer surplus is areaA