【单选题】Washington D.C. is named after___________.
A.
the U.S. President George Washington
C.
both George Washington and Christopher Columbus
【单选题】What does the author say about the weather?
A.
It is rare for Washington,D.C. to have such long rainy days.
B.
It has been mining since Sept 26th for the most of the time.
C.
It is favorable to the manufacturers to promote solar equipment.
D.
It has helped see the disadvantages of solar energy.
【单选题】Washington D.C. is located between ( ) and ( ).
D.
West Virginia, Virginia
【单选题】Which state does Washington D.C. belong to?
【简答题】A. He just couldn't appreciate the music. B. He disagrees with the woman. C. He likes to play the piano. D. He also enjoyed the concert.
【判断题】胶体系统是动力学稳定系统,是因为胶体粒子具有布朗运动。