你能帮帮他们吗
the boy who is standing ad the door is my brother.这句话去了从句以后主
1年前
The length of each leg of an isosceles right triangle is 40.
1年前
(2011•密云县二模)我们能看到本身不发光的物体,是因为光照到物体上发生了______.(选填“镜面反射”或“漫反射”
1年前
Don't ask me to have forever how far,I don't know and I also
1年前
It takes (about 40 minutes) to walk to the cen-ter of Beijin
1年前