布罗代尔在《文明史纲》中指出：“我们所说的‘工业文明’正处于合成一个能够容纳世界整体的共同文明的过程之中。所有文明已经、正在或将要受到它的冲击。然而，即使假定世界上所有文明或早或晚终将采纳相同的技术……我们在长时期内仍然将面对事实上非常不同的各种文明。”罗代尔强调的是（    ）

    Skin-diving （轻装潜水）is a new sport today. Many people show interest in this sport. Some go under water to see beautiful scenes(景色).____go down into deep(深的) water to take pictures of swimming fish. It is not dark under water and there are a lot of big or little fish living there. Some of them use the sand to ____their homes. If you are under water, you will find you are just in a fish village.

    There is no wind under water.____ is blue and green. During the day, there is much light. Sometimes people do not have to use a flash(闪关灯)to take ____under water.

    This sport takes you into a wonderful new world. When you are under water,____ is easy for you to carry a big stone(石头). It is____a trip to the moon!

    Catching fish is one of the most ____ parts of this sport. When fish swim nearby, you can catch them____ your hands.

我国的“神州”号载人飞船发射成功，使飞天的梦想成为现实，火箭发动机里使用液态氧的作用是

肺的主要功能是（   ）