有关动物生殖发育的叙述，正确的是(   )

①桑蚕的发育过程为不完全变态发育       ②青蛙为雌雄异体，体内受精

③临朐山蝎的生殖方式为卵胎生   ④鸟类的繁殖具有季节性、多伴有筑巢、求偶等行为

⑤虹鳟鱼为雌雄异体，体外受精

阅读下文，回答相关问题
【甲】陋室铭
刘禹锡
山不在高，有仙则名。水不在深，有龙则灵。斯是陋室，惟吾德馨。苔痕上阶绿，草色入帘青。谈笑有鸿儒，往来无白丁。可以调素琴，阅金经。无丝竹之乱耳，无案牍之劳形。南阳诸葛庐，西蜀子云亭。孔子云：“何陋之有？” 
【乙】《爱莲说》（节选）
周敦颐
予谓菊，花之隐逸者也；牡丹，花之富贵者也；莲，花之君子者也。噫！菊之爱，陶后鲜有闻；莲之爱，同予者何人？牡丹之爱，宜乎众矣。

下图是我国西北和江南两处传统民居景观图，读图回答下列各题。

A: Hello, I'm Barry Lai, a reporter with TV News. Would you mind ____a few questions about the events of this afternoon?

B: Not at all

A: All right then. ____were you when the birds landed?

B: I was shopping in Central.

A: How many birds do you think there were?

B: I'd say there were about 1,000 birds in all.

A: Can you tell me what ____looked like?

B: They were small brown and green birds.

A: And what did they do, exactly?

B: Well, they ____and landed in Statue Square. They stayed there for about 15 minutes before flying off again.

A: How did people react?

B: Oh, everyone was amazed. Traffic stopped ____and the police had to be called.

A: OK. Thanks very much for talking to me.

取氯酸钾和二氧化锰的混合物26g，加热至混合物固体质量不再减少为止，冷却后称得剩余固体质量为16.4g，计算：

①生成氧气的质量。

②原混合物中氯酸钾和二氧化锰的质量。