流感病毒核酸为（）
A.+ssRNA
B.-ssRNA
C.-dsRNA
D.+dsRNA
E.dsDNA
参考答案：B
Every day the boy, together with his classmates,_______to go to the sports ground and______football, _________themselves.
A．are noticed; play; enjoying
B．is noticed; plays; enjoying
C．are noticed; plays; enjoys
D．is noticed; play; enjoying
八股文
