What is usually used as the frame of skyscrapers?
举一反三
- What is not usually used to decorate the Christmas trees?
- Are beauty products used by women only? What do men usually do with their physical looks?
- Apartments are usually used in America, while ______ are usually used in UK.
- According the passage, what is one disadvantage of skyscrapers that have mirrored walls?
- What frame type is used to signal TSPEC reservation from a client?（） A: RSVP B: ADDTS C: 802.11 association information elements D: WMM capabilities exchange