According to Rix, guidelines are followed when you're about to set foot in Antarctica and tourists have to disinfect (为……消毒) their boots to make sure no alien species are introduced.

　　And once on land, there's no eating or smoking. Rocks, bone fragments — nothing should be taken as a souvenir and nothing should be left behind. Tourists fortunate enough to visit Antarctica must be aware that this is not their home and keep their fingers crossed that future generations will also be able to enjoy such breathtaking views.

　　语篇解读：本文是一篇说明文。游客应该去南极洲旅游吗？本文介绍了去南极洲旅游的情况和对游客的要求。

　　5．According to the second paragraph, we can learn that ________.

　　A．Antarctica has become the best place for people to travel

　　B．only scientists can be allowed to go to Antarctica

　　C．Antarctica is less affected by human activities

　　D．no animals can survive in Antarctica except penguins

　　解析：选C　推理判断题。根据第二段的第二句“It's considered the last great wilderness on Earth.”可知，它被认为是地球上最后的不毛之地。由此可推知，南极洲受人类活动的影响较小。

　　6．Juliet Rix's travel in Antarctica mentioned in the fourth paragraph indicates that ________.

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