题目内容：

 

“Internet of Things” (IoT) was a hot topic at the Second World Internet Conference held in Wuzhen, Zhejiang. Experts said at the conference that in five years, there could be 30 to 50 billion IoT devices (设备) connected to and shaping our lives. Look at the chart below. What will things be like in five years? Let’s take a look!

1.The number of connected devices        the number of World population is equal to the number of connected devices per person.

A. plus    B. minus

C. multiplied by    D. divided by

2.       devices have been connected to the IoT by the year of 2020.

A. 500 million    B. 12.5 billion

C. 25 billion    D. 50 billion

3.From the chart, we can learn that        .

A. fewer and fewer people are using connected devices

B. more and more people are using connected devices

C. the number of connected devices was fewer in 2015 than in 2010

D. it is increasing of population that leads to increasing of connected devices