A:0°纬线上
B:180°经线上
C:0°经线上
D:南极或北极点上
下列对实验现象的描述或实验操作正确的是( )
A. She's my mother.
B. I have a happy family.
C. What's this?
D. This is my father.
Rose: ____
Tom: It's a picture (照片) of my family.
Rose: Who's this?
Tom: ____
Rose: Who's she?
Tom: ____ And this is me.
Rose: Are you happy?
Tom: Yes. ____
如果某物体的三视图是如图所示的三个图形,那么该物体的形状是()
暴雨过后,某地遭遇山体滑坡,武警总队派出一队武警战士前往抢险.半小时后,第二队前去支援,平均速度是第一队的1.5倍,结果两队同时到达.已知抢险队的出发地与灾区的距离为90千米,两队所行路线相同.
放学后