函数 $f\left(x\right)\text{=}\frac{4}{x-2}\left(x\in 3,6\right)$ 的值域为____

《儒林外史》中的范进，多年考不中举人，直到50多岁时才金榜题名，但却“喜极而疯”。这则故事给我们的启示是（    ）

根据对话内容，从方框中选择恰当的选项补全对话，其中有两项多余。A：Hello, Sean．
B：Hi, Peter． ____
A：No, I don't． ____
B：She's Tracy．She is my sister's friend．
A： ____
B：Yes, my sister always tells me her things (事情)．I even(甚至)know her eating habits．
A：Really? ____
B：She likes milk and eggs for breakfast．She likes vegetables for lunch and fruit for dinner．
A：I think she eats well．
B：Yes, and she always plays tennis. We must learn from(向……学习) her. ____
A：OK. Let's meet at 5：00．

A．Who is she? B．What are they? C．Do you know her? D．Is the girl your sister's friend? E．The girl's eating habits are very good． F．What about playing tennis after school? G．Do you know the girl in green in Class Four?

有比例尺为①1：1 000 000，②1：100 000，③1：1000图幅相同的三幅地图，据此判断下列说法正确的是：

（2011年四川乐山，8题）钾是维持人体生命和植物生长所必须的元素。下图是从元素周期表中得出的部分信息。下列关于钾元素的有关叙述错误的是