【简答题】TCP/IP 协议参考模型共分了_______层,其中从下往上数第3层是_______ 。
【单选题】周代用六瑞祭天地四方,其中以青圭祭( )
【判断题】Using strong, credible testimony is the best way to add human interest to a speech.
【单选题】Which is NOT the one that the president call on students to do at the end of his speech?
A.
To carry their responsibilities
B.
To cherish the opportunities
C.
To travel around the world
D.
To bulid a strong future for the later generations.