阅读下面这首诗，完成后面问题。
                                                                                      江亭夜月送别二首（其二）
                                                                                                    王勃
                                                                                               乱烟笼碧砌，
                                                                                               飞月向南端。
                                                                                               寂寞离亭掩，
                                                                                                江山此夜寒。

在括号里填上“m”或“cm”。

一张课桌高约75____    一条黄瓜长20____

教室黑板长约4____    小明高约130____

①A线是季风区与非季风区的分界线  ②B线是农耕区与牧区的分界线  ③C线是我国人口地理分界线（黑河—腾冲一线）  ④D线是暖温带与亚热带的分界线  ⑤E线是内流区域与外流区域的分界线