问题 填空题

我们生活的世界由丰富多彩的物质组成,物质是由微小的粒子构成的.现有氯化钠、水银、二氧化碳三种物质,其中由分子构成的是(填化学式,下同)______,由离子构成的是______,由原子直接构成的是______.

答案

二氧化碳是由二氧化碳分子构成的,其化学式为CO2;氯化钠是由钠离子和氯离子构成的,其化学式为NaCl;水银是金属汞的俗称,属于金属单质,是由汞原子直接构成的,其化学式为Hg.

故答案为:CO2;NaCl;Hg.

完形填空

What will our world be like in 2020? Maybe no one knows. Because we never know what will happen in the future. But it’s very interesting to make some predictions. Here are some exciting predictions.

Languages

English should still be the most popular language, but Chinese should be the second. Now, many foreign people are studying Chinese    A   their second language.

Water

①Water will become as expensive as oil because many rivers will disappear. We will haveto save water and pay more for clean water.

Education and Science

Students won’t go to school. They will stay at home and study online. Students from all over the world may study together    B   the Internet. We may eat more genetically (转基因) modified food. And more robots will be around us. ②Lots of danger housework will be done by them.

Living

People will live and work under the sea. Perhaps there will be big towns, factories and farms under the sea, too. Everyone will carry a pocket computer. ③computer, the, answers, will, all, the, to, their, people, problems, give. Everyone will have telephones in the pockets, too, and they will be able to talk to their friends all over the world.

任务一: 请在文中A、B 两处的横线上填入适当的单词。(每空一词)

小题1: A. _________    B. _________

任务二: 请将文中①处句子译成汉语。

小题2:________________________________________________________。

任务三: 请将文中②处划线句中的一个单词的错误用法找出,并改正在横线上。

小题3:________________________________________________________

任务四: 请将文中③处的斜体单词连成句子。

小题4:. ________________________________________________________.

任务五:  小题5:The passage is mainly talking about _________.

A.education and science

B.the school life

C.the life in the future

D.the most popular language

多项选择题