The girl sitting next to me on the plane was very nervous, for she         before.

目前人类利用的淡水资源主要是

阅读下文，回答问题
                                                                                                  On the beach
    It is a fine day. A lot of people go to the beach to enjoy sunshine. Some people are swimming like fishes in the sea. On the beach，some young people are playing volleyball.
    Some of them are lying under the coconut trees. And some old people are chatting with each other. What are the children doing? Look! They are making castles with spade and sand. They are having fun。
⑴⑵⑶⑷⑸根据短文内容，判断正误；⑹根据短文内容填空。

下列关于实验现象的描述，错误的是（  ）

“土豪”“洪荒之力”、“蓝瘦”“香菇”等网络热词出现后，受到热捧，人们在日常交流中广泛使用。这说明（    ）

①网络文化潜移默化地影响人们的生活

②网络文化深远持久地影响人们的生活

③人们接受文化受知识水平的影响很大

④文化影响人们的交往行为和交往方式