单选题
Last Tuesday a trucker paid $155.76, including 10 percent state and federal taxes, for diesel fuel. What was the price per gallon for the fuel if the taxes are excluded?
(1)The trucker paid $0.118 per gallon in state and federal taxes on the fuel last Tuesday.
(2)The trucker purchased 120 gallons of the fuel last Tuesday.
(A) 条件(1)充分，但条件(2)不充分．
(B) 条件(2)充分，但条件(1)不充分．
(C) 条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分．
(D) 条件(1)充分，条件(2)也充分．
(E) 条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．
(1)The trucker paid $0.118 per gallon in state and federal taxes on the fuel last Tuesday.
(2)The trucker purchased 120 gallons of the fuel last Tuesday.
(A) 条件(1)充分，但条件(2)不充分．
(B) 条件(2)充分，但条件(1)不充分．
(C) 条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分．
(D) 条件(1)充分，条件(2)也充分．
(E) 条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．
【正确答案】
D
【答案解析】[解析] 根据题意可知每加仑汽油的税款是其价格的10%，所以每加仑汽油不含税的价格是税款的9倍，即为9×0.118=1.062美元，因此(1)充分；根据(2)可得每加仑汽油不含税款的价格为：
