解:(Ⅰ)由|x﹣1|+|4﹣x|≥|(x﹣1)+(4﹣x)|=3,
当(x﹣1)(4﹣x)≥0,即1≤x≤4时,取得最小值3.
由不等式|x﹣1|+|4﹣x|<m的解集不是空集,
可得m>(|x﹣1|+|4﹣x|)min,
即为m>3.
可得m的取值范围(3,+∞);
(Ⅱ)函数f(m)=m+<
在以煤为主要原料的合成氨工业中,原料气氢气常用下述方法获得:
①C+H2O(g) CO+H2;
②CO+H2O(g) CO2+H2;
补全对话
从方框中选择最佳选项完成对话, 有两项多余
A. Oh, I see.
B. They’re buying food and vegetables.
C. We’re having a good time.
D. some people aren’t shopping
E. Why are some of them going away in a hurry?
F. Thank you.
G. They are choosing and talking.
A: Look! There are many people in the shop. What are they doing?
B: ____
A: Yes, but____ in the shop. What are they doing in the shop?
B:____
A:____
B: Because they are leaving for home.