各位同学好，今天我们学习如何介绍新技术和新科技。

本次课课后的学习任务单如下：

一、复习本单元PPT内容，背诵以下词汇和短语。

1. connecting        joining

2. raise     lift/make something go up

3. transported    carried(objects, over a distance)

4. support     hold something firmly/bear its weight

5. attached    fixed

6. ascend    climb up

7. descend    climb down

8. powered   provided with energy/moved by a force

9. controlled    driven / have movement directeded

2. 演讲任务

题目：A High-tech Gadget/Technology that Takes us to the Future

要求：根据课上所学的天空电梯的演讲结构，介绍一项高科技技术或产品，演讲需要包括以下内容。

1. What is it?

2. What is it used for? 

3. operation，function, cost, 

4. challenges or risks, prospect, … etc.