函数f(x)＝x²－3x+2的零点是(    )

阅读理解，判断对错

      Simon is a good boy. Today is Sunday and it is fine, so Simon's father takes him to visit the Great Wall. The Great Wall is far away from his home. So they are going there by bus. The Great Wall is about six thousand seven hundred kilometres. It's very long and great. Simon is very happy and his father is happy, too.

一个三角形和一个平行四边形面积相等，底也相等，若平行四边形的高是24厘米，那么三角形的高是（　　）厘米．

下列有关甲型H1N1病毒和艾滋病病毒的叙述中，错误的是（　　）

如图，图钉尖的面积是5×10^-8m²，图钉帽的面积是1×10^-4 m²，松木能承受的最大压强是5×10⁶Pa . 以下说法正确的是（）