A:溴水
B:NaHCO3饱和溶液
C:NaOH溶液
D:Na2CO3溶液
(____) 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.
计算,能简算的要简算.
12.5×16×0.5=____
如图为我国东部季风区某山区的地形图,在开发本地的过程中,不合理的做法是( )
I really enjoyed the long ____ (飞行) with him last week.