【单选题】L anguage helps human being:
A.
set themselves apart from the animal world
B.
ties the whole society together and develop their thinking
C.
organize their activities and promote social civilization
【单选题】在一个圆周上任取三点,将三个点依次连接,则下列错误的是
【多选题】在一个圆周上任取三点,将三个点依次连接,则下列正确的是
D.
连接成一个直角三角形、锐角三角形或钝角三角形的概率都是1/3
【简答题】99.17/23 的网络地址是 ___________________,广播地址是___________________,以及有效的主机地址范围是_____________________至___________________________
【简答题】What is good teachin g?