My summer camp isn’t          good fun, but it is        real learning experience for me.

A．a; /

B．the; a

C．/; a

D．a; the

大头瘟临床基本特征是：（）.

A.发热恶寒

B.发热头面赤肿大

C.但热不恶寒

D.咽喉疼痛