若代数式(m-2)x²+5y²+3的值与字母x的取值无关，则m的值是（   ）

水的电离平衡曲线如如图所示，下列说法不正确的是（　　）

若在区间0，2中随机地取两个数，则这两个数中较大的数大于$\frac{1}{2}$的概率是（　　）

    During the summer holiday，Alice had a nice trip．First she took a plane from Changchun to Beijing．She went to the Great Wall．She was very tired．But she was  happy．She likes Beijing very much．Then she went to London by plane．She visited Big Ben，the clock tower．There were many museums in London．She learnt a lot there．People in London love eating fish and chips．She stayed in London for 5 days．Then she took a plane to Shanghai．Then she went to Changchun by plane．

根据短文，判断正误。