致病性最强的病原菌是()。
A.厌氧性链球菌及大肠杆菌
B.大肠杆菌
C.β溶血性链球菌
D.葡萄球菌
E.产气荚膜杆菌及肺炎球菌
参考答案:C
—Jim jumped much _______ than John.
—Yes. He got the first in the sports meet. [ ]
A. high
B. higher
C. highest
D. the highest
简述进行奥氏体不锈钢压力容器的试压工作。