扁桃体周脓肿的常见致病菌包括()
A.金黄色葡萄球菌
B.厌氧菌
C.乙型溶血性链球菌
D.甲型草绿色链球菌
E.大肠埃希菌
参考答案:A, B, C, D
In order to prevent people spreading rumours through the Internet, the government decided to place ______ on the freedom of spreading news on line.
A.orders
B.reservations
C.restrictions
D.scales
鸡球虫孢子化卵囊的长度范围在( )。
A.10~35微米
B.50~100微米
C.100~150微米
D.150~200微米
E.200~350微米