A:三角形两边的差小于第三边
B:凸多边形的外角和都等于360°
C:凸五边形共有4条对角线
D:三角形三条中线的交点是三角形的重心
Oxes can count numbers. So people th ink they are _____.
现有两个分别标有“6V 6W”和“3V 6W”的灯泡L1和L2,若将它们并联后接在某一电源上,使其中一个灯泡正常发光,干路允许通过的最大电流是 ____ A.
根据句意及首字母提示完成单词(1)How many c____ are there in the world?(2)Can you write to me s____ ?(3)People in France do not like s____ English.(4)Koalas(树袋熊)come from A____ .(5)Miyoko l____ in Tokyo, Japan.