下列各项不属于内河航运工程船舶费用定额的是()
A.整治炸礁船
B.混凝土搅拌船
C.挖泥船
D.打桩船
参考答案：B
Mary _____ go to school by bike, but now she usually takes a school bus to school. [ ]
A. used to
B. had to
C. was afraid to
D. preferred to
崩解时限检查法中国药典（2010年版）规定为（）
A.浆法
B.吊篮法
C.滴定法
D.转篮法
E.加热法
