题目

I’d like five ________, please.A.glasses of water B.glasses water C.glass of water 答案：【答案】A【解析】句意：请给我五杯水。考查不可数名词及其数的表达。“water水”不可数名词，表示数量时用“数词+量词(普通名词)+ of + 不可数名词”。又空格前面有数词“five”，量词要变复数，即five glasses of water。故选A。抛物线y2=4x的焦点为F,准线为l,经过F且斜率为的直线与抛物线在x轴上方的部分相交于点A,AK⊥l,垂足为K,且△AKF的面积是(　　)A.4                                     B.3C.4                               D.8