我国紫金山天文台发现的一颗小行星和月球上一座环形山都以我国南朝一位科学家的名字命名的,这位科学家是()
参考答案:祖冲之
There are some things for children. Let's . [ ]
A. give away them
B. gave away them
C. give them away
D. gave them away
水冷壁损坏的现象?