细胞内染色体的组成是（   ）。

根据《民族区域自治法》的规定，我国各民族都有发展本民族文化的权利，这一权利体现了（    ）

⑴What did you do this evening?____

⑵Who won?____

⑶Did Bob's team play a game?____

⑷Did they watch Bob play basketball?____

⑸Did Danny learn to play basketball?____

A.No, he didn't.

B.Yes, they did.

C.Bob's team won.

D.Yes, his team played with the Orange Team.

E.We watched Jenny play football.

2010年4月冰岛火山爆发，火山灰中含有一种叫砒霜的物质，砒霜的主要成分是三氧化二砷（As₂O₃），其中砷的化合价为（  ）