题目

She was knocked ______by a car and now is still        ． A．down; in danger                                                B．off; dangerous C．down; dangerous                                               D．off; in danger 答案：A按要求解答各题（1）计算：|-3|+（-1）2011×（π-3）0-327；（2）解方程组2x+3y=74x-y=1；（3）周长为24cm的等腰三角形的腰长为x，底边长为y，求y与x之间的函数关系式和x的取值范围．