— How was your weekend, Mary?

— I had a busy ______. I did a lot of things. [ ]

A. it

B. this

C. one

D. that

幽门螺杆菌与空肠弯曲菌比较，最突出的特点是（）

A.属微需氧菌

B.生化反应不活泼

C.不发酵糖类

D.脲酶丰富

E.氧化酶试验阳性