【单选题】( )是UML模型中的解释性部分,可以用来描述、注解UML模型中的任何元素。
【单选题】在抗震设防 8度区,高层建筑平面局部突出的长度与其宽度之比,不宜大于下列中哪一个数值?
【单选题】When something is on fire, people throw sand on it to put out the fire. The main use of the sand is to _________.
A.
protect the thing on fire
B.
add weigh to the thing on fire
C.
keep the air away from the thing on fire
D.
lower the temperature of the thing on fire