单项选择题 Farmers can save a considerable amount of pesticide by_________．A.transforming poisoned rainB.consuhing infrared scanning expertsC.resorting to spot-sprayingD.detecting crop problems at an early date

单项选择题 data: x,y=0.3  ?;   enddata 下列说法正确的是 A、x=0.3,y=?  B、 x=0.3 y=任意数值 C、x=0.3,y的值不确定 D、x=0.3, y的值实时输入

单项选择题 （ ）He is always complaining about one thing or__________．A.othersB.somethingC.anotherD.everything