下列最能直观地呈现出地形起伏状况的是（　　）

对如图所示漫画，最贴切的理解是（    ）

    Here are five kinds of animals. Elephants eat plants and fruit. They like water. The zebra ____in Africa. It eats leaves and grass. There ____only about 1,800 ____ in China. They eat bamboo and plants. The tiger is in Asia. It is large ____strong. It eats meat. It is good at swimming. Monkeys live in Africa, Asia and America. They eat meat, leaves, fruit and ____eggs.

函数$f\left(x\right)$的定义域为D，若对于任意$x_1,x_2\in D$，当$x_1<x_2$时都有$f\left(x_1\right)\le f\left(x_2\right)$，则称函数$f\left(x\right)$在D上为非减函数，设函数$f\left(x\right)$在0，1上为非减函数，且满足以下三个条件：①$f\left(0\right)=0$；②$f\left(\frac{x}{3}\right)=\frac{1}{2}f\left(x\right)$；③$f\left(1-x\right)=1-f\left(x\right)$，则$f\left(\frac{1}{3}\right)+f\left(\frac{1}{8}\right)$等于（   ）

1937年8月，蒋介石夫人宋美龄在中国妇女慰劳自卫抗战将士总会成立大会陈词：“我们要保全国家的完整，保护民族的生命，应该尽人人的力量，来抵抗敌人的侵略。我们妇女也是国民一分子……打仗的时候男子要上前线杀敌，后方工作是我们的责任”，宋美龄意在强调（   ）