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【单选题】
苯巴比妥A.
高氯酸滴定液
B.
亚硝酸钠滴定液
C.
氢氧化钠滴定液
D.
盐酸滴定液
E.
硝酸银滴定液 以下药物含量测定所使用的滴定液是
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举一反三
【简答题】a staff(salaried) photographer: a ______ photographer
【判断题】Shanghai Metro, the world’s longest metro system, is the oldest metro system in China. ( )
A.
正确
B.
错误
【单选题】The study rooms are NOT equipped with ______.
A.
air-conditioners
B.
closed-circuit TV
C.
projectors
D.
tape-recorders
【简答题】国内异步电动机的工作频率均为 Hz
【单选题】The photographer gave me a number of photos to use with this story, but__________of them is quite right.
A.
all C. some
B.
many D. none
【简答题】a staff(salaried) photographer: a ___________ photographer
【简答题】国内异步电动机的工作频率均为 HZ.
【单选题】Richard is a photographer. What does a photographer do?
A.
Take care of the patients.
B.
Take pictures.
C.
Sell clothes.
D.
Work in the office.
【单选题】a staff(salaried) photographer: a ______ photographer
A.
freelance
B.
professional
C.
qualified
D.
inexperienced
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