【简答题】Washington, D.C. Bicycle Tours Cherry Blossom Bike Tour in Washington, D.C. Duration Tour This small group bike tour is a fantastic way to see a world-famous cherry trees with beautiful flowers of Was...
【简答题】Washington, D.C. reminds visitors of ______.
【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.
【简答题】Washington, D.C. is ______ of the U. S.
【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。