LEDs used in traffic lights are developed by Holonyak's students.

• A、 True
  
  

• B、False
  
  

• C、Not Given
  
  

假设你的美国朋友Mike要去你的家乡旅游，请给他写一封电子邮件，告诉他:

1. 近期的天气情况；

2. 需要注意的事项；

3. 你期待与他见面。

请以 Like 署名

Which of the following is true according to the passage?

• A、Skyscrapers provide more usable space than other buildings.
  
  

• B、The skyscrapers first appeared in the late 1960's.
  
  

• C、Where there are skyscrapers, television reception is poor.
  
  

• D、The two World Trade Center towers are skyscrapers.