题目: —Do you think I can pass the driving test?—________, I'm afraid.A.Of courseB.You canC.Not a chanceD.Not a little 答案: 答案:CC not a chance “不可能”。
题型:选择题 用换元法把方程3(x2+3)x+3+5(x+3)x2+3=8化为3y+5y=8,那么下列换元法正确的是( )A.1x+3=yB.1x2+3=yC.x2+3x+3=yD.x+3x2+3=y 查看答案