若a＞b，则下列式子正确的是（      ）

贺州市矿产资源丰富，尤其是以锡、钨的储量最丰．如图是锡在元素周期表中的信息，下列有关锡的说法错误的是（　　）

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① How many books do you have?____     A. I bought a lot of books.

② What are the rabbits doing?____     B. They are onions.

③ Can you play the piano? ____     C. I have twenty books.

④ What did you do last Sunday? ____     D. They are jumping.

⑤ What are these?____     E. Yes, I can.

定义一种新运算：a※b=$\left\{\begin{array}{c}a-b\left(a\ge b\right)\\ 3b\left(a<b\right)\end{array}\right.$，则当x=3时，2※x﹣4※x的结果为____