【单选题】Two forces, each of magnitude 8 N, act on an object. The angle between the two forces is 60o. What is the magnitude of the resultant force acting on the object?
【简答题】用所给词的适当形式填空。 1. Can you tell me your reason for_______ (leave) home in a hurry? 2. Phelps won eight _______ (golden) medals in swimming in the Beijing Olympics. 3. Who _______ (invent) basketball in 1...
【简答题】用所给词的适当形式填空: 1. The clever girl can work out the problem __________ (easy). 2. Can you find the __________ (different) between the twins. 3. Daniel becomes__________ (interest) in pets. 4. Kitty is __...