我国的能源资源中，第一大能源是
A：石油
B：煤炭
C：核能
D：水力资源
(____) These are all books about science.
(____) That's a good idea.
(____) Let's put them on this shelf.
(____) We can put them on Shelf B.
(____) Let's make a home library.
下列有关原子或分子的说法错误的是
