可用于鉴别霍乱弧菌古典生物型和EITor生物型的试验是
A.氧化酶试验
B.多粘菌素敏感试验
C.硝酸盐还原试验
D.鸟氨酸脱羧酶试验
E.耐盐试验
参考答案:B
—Are there any computers on the desk?
—______ [ ]
A. Yes, there are some.
B. There are some.
C. Yes, there are any.
D. There are any.
最常见也最需要干预的老年人情绪状态是()
A.焦虑和抑郁
B.害怕和紧张
C.拒绝和孤独
D.失望和消极
E.孤独和消极