在自然数1----20中:

是质数又是偶数的数是____，是奇数又是合数的数是____、____．

(从小到大依次填写)

——Do you mind my smoking here?

——_________, Look at the sign. It says, “No Smoking.”

山脉是地形的“骨架”，对图中①﹣④地形区的判断正确的是（    ）

阅读下面的古诗文，完成后面文问题。
                                                                                                    晚春江晴寄友人
                                                                                                              韩琮
                                                                                          晚日低霞绮，晴山远画眉。
                                                                                          春青河畔草，不是望乡时。