可用于驱除牛和羊体内绦虫的药物是()
A.氯硝柳胺
B.伊维菌素
C.三氯苯达唑
D.噻嘧啶
参考答案:A
小儿腹泻发病率高的年龄组是()
A.<3个月
B.3~5个月
C.6个月~2岁
D.3~4岁
E.5~6岁
A certain truck uses 18 gallons of diesel fuel in traveling 270 miles. In order for the truck to travel the same distance using 10 gallons of diesel fuel, by how many miles per gallon must the truck’s fuel mileage be increased ?()
A. 8
B. 9
C. 12
D. 15
E. 27