Which of the following is not among the basic features of a relational database?

A．It does not matter what order the rows are in.

B．It does not matter what order the columns are in.

C．Different columns should have different column names.

D．Different columns should have different data types.

[单选题]Which of the following is NOT among the reasons that India is creating a secondary sanctuary for the Asiatic lions?A．Too many of them in the present sanctuary.B．Possible outbreak of disease.C．Clashing with people.D．Food shortage.

[单选题]Among the following poets， who is NOT a lake poet？( )A.Samuel Taylor Coleri

[单选题]Among the following poets， who is NOT a lake poet？( )A.Samuel Taylor Coleri

[单选题]The following American states are among the first thirteen colonies except(

[单选题]The following American states are among the first thirteen colonies except(

[单选题]In a computer，which of the following is the longest period? (66) .(66) A．Beat periodB．Machine periodC．Instruction periodD．CPU period

[单选题]Which of the following is NOT mentioned？A．Supermarket. B.Police station. C.School.

[单选题]Which of the following information is NoTmedtioned？A．Who wrote the stories. B.Which story is the longest.C．When we added the stories. D.Who added the stories.

[单选题]Which of the following is the result of the volcanic eruption?A． People stop traveling in EuropeB． Airlines suffer from the loss of planesC． It becomes dangerous for animals to eat outsideD． Farmers have lost many of their animals

[单选题]To which of the following is the author most likely to agree?［A］ the rich and the poor are equal in the face of death. ［B］ more scientists are needed for the medical advancement.［C］ there is a double standard in medical ethics. ［D］ the dead deserve t