单项选择题

A group of scientists are conducting a（）into the feasibility of cloning human beings.

A.entrance
B.research
C.inquiry
D.investigation

你可能感兴趣的试题

单项选择题

A desktop computer’s sound card sends signals to external _____.

A.speaker
C.Modem
D.keyboard

两个以上单位或者个人合作完成的发明创造，除另有协议的外，申请专利的权利属于完成或者共同完成的单位或者个人。()

答案：正确