题目

TOKYO, JAPAN--What do you do when you see a cockroach (蟑螂）？ Do you hit it with a newspaper? Do you step on it? When researchers at Tokyo University see a cockroach, they take the remote control and make the cockroach turn around, run left or right, or go forward. These scientists are changing the cockroaches into robots. Each cockroach has a very small pack that has in it a microprocessor(微处理器）.Then researchers can send signals from the remote control to the pack. The signals control the movements of the cockroaches. Why does anyone want to control a cockroach? “I阅读下面文字，按要求回答问题。 水，是我们生命中不可或缺的元素。过去，大家总是认为，水“取之不尽，用之不竭”。但事实上，水将成为石油危机之后的下一个社会危机。我国的人均水资源拥有量还不足世界人均量的1/4，是世界13个严重贫水国家之一。今年，我国遭受到百年不遇的旱灾，两千万人饮水困难，这正是大自然为人类鸣起的警钟；所以，________。 (1)画横线的句子在表达上存在错误，请予修改。 ________________________________________________________________________　 ________________________________________________________________________　 (2)请在文中横线处填上一个恰当的句子。 ________________________________________________________________________　 ________________________________________________________________________