①公有制经济和非公有制经济都是我国国民经济的主体
②我国各种所有制经济地位平等、相互影响、相互促进
③各种所有制经济都是社会主义市场经济的重要组成部分
④公有制经济和非公有制经济都是我国经济社会发展的重要基础
A： ①③
B：②④
C：①②
D：③④
A：Wow! What a great model plane! Is it yours，Jack?
B：Yes，it's mine．
A：____
B：For two days．
B：At Green Store。
B：It's six dollars．
B：I've given it to Peter．
B：Because he likes it a lot．
A．How much is it?
B．Why did you give it to Peter?
C．How long have you had it?
D．Where did you buy it?
E．Why are you selling it?
F．Where's your old model plane?
G．Can I have a look at your old model plane?
下列属于男性体细胞中染色体组成的是（ ）
小的
