题目

已知函数 在 上单调递增，若 恒成立，则实数 的取值范围为（ ） A . B . C . D . 答案：CThe technology is improving every year. We will see some very exciting home robots in the next few years. In the future the robots can do lots of things.1. Getting thingsIn a few years, it will be possible to tell your home robot to get a piece of bread for you.The robot will use its eyes and an arm to get the bread for you.2. Watering plantsFuture robots will carry water to water plants.3. Telling dangers(危险)A home robot will find out fire, smoke(吸烟）and other dangers easily. Every night the robot will make its rounds to make sure that everything is right.4. Looking after childrenA robot will help us look after our children well while we are not at home.【1】A robot will get something for you with______.A. a hand B. eyes and a legC. an arm D. eyes and an arm【2】What does the phrase “make its rounds” mean in Chinese?A. 转圈 B. 巡查 C. 工作 . 制作【3】What will robots do when people are not at home?A. Robots will do housework with the children.B. Robots will cook for the children.C. Robots will look after the children.D. Robots will smoke with the children.【4】What doesn’t this passage tell us the robots will do?A. Carry heavy things. B. Look after children.C. Look after plants. D. Get things for people【5】What does the passage talk about?A. The habit of robots B. The dream of robotsC. The future of robots D. The life ofspan> robots