脓液粘稠，黄色无臭味（）
A.金黄色葡萄球菌
B.溶血性链球菌
C.大肠杆菌
D.铜绿假单孢子菌
E.类杆菌
参考答案：A
I heard a soft _______ at the door. When I looked up, I found it was Mary.
A．noise
B．sound
C．voice
D．cry
为何离合器从动部分的转动惯量要尽量小？
