常伴有转移性脓肿（）
A.金黄色葡萄球菌
B.溶血性链球菌
C.大肠埃希菌
D.绿脓杆菌
E.变形杆菌
参考答案：A
M: How about joining me for a cup of coffeeW: I’d love to, but I’m exhausted. I was up till 3 this morning, writing a paper for my literature class.Q: Why does the woman decline the man’s invitation().
A. She wants to get some sleep.
B. She needs time to write a paper.
C. She has a literature class to attend.
D. She is troubled by her sleep problem.
什么是固定化酶，它们用于生产有哪些优点
