假設你的美國朋友Mike要去你的家鄉旅游，請給他寫一封電子郵件，告訴他:

1. 近期的天氣情況；

2. 需要注意的事項；

3. 你期待與他見面。

請以 Like 署名

According to the passage, which aspect of skyscrapers were some residents of North America concerned with in the late 1960's?

• A、The poor reception of radio and TV signals.
  
  

• B、The removal of trees and grass from building sites.
  
  

• C、The harmful effects on the city's plans.
  
  

• D、The obstruction of air traffic
  
  

When Holonyak invented LEDs, he believed that they would have a wide range of uses.

• A、True
  
  

• B、False
  
  

• C、Not Given