苯丙氨酸脱氨酶试验几乎100%阳性的细菌有()
A.奇异变形杆菌
B.产碱普罗威登斯菌
C.摩根摩根菌
D.阴沟肠杆菌
E.粘质沙雷菌
参考答案:A, B, C
Unfortunately, his father died, ______ the family even worse off.
A.left
B.to leave
C.leaves
D.leaving
Let's go to the zoo to plant trees, _____? [ ]
A. do you
B. don't you
C. shall we
D. will you