- 搜标题
- 搜题干
- 搜选项
单项选择题
What's the main idea of this passage?
What's the main idea of this passage?
A、Scientists are trying to develop high technologies for people to live longer.
B、Scientists are trying to grow artificial meat with genetic change and nanotechnology.
C、Scientists are trying to find many ways to produce food to feed people in the future.
D、Scientists are trying to protect our environment for people to survive in the next century. 无解析
