下列有关酶的叙述正确的结论有
①产生酶的细胞都有分泌功能
②部分从食物中获得，部分在体内转化
③酶的基本单位是氨基酸或核糖核苷酸
④酶是生物催化剂
⑤生长激素与呼吸酶可来自于同一个细胞

猜谜语。

此物老家在非洲，力大气壮赛过牛，张口大嘴一声吼，吓得百兽都发抖。  （猜一动物）      

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有我国“南大门”之称谓的区域

    Mrs. Green lives in the country, and she doesn't know London very well. One day, she went to London. She couldn't find her1Just then, she2a man near the bus stop. " I can ask him the way." she says to3and asked, "Excuse me, will you please4me the way to King Street?" The man smiled with5answers. He 6know English. He spoke Russian. He was a 7Then he8his hand into his pocket,9a piece of paper and let her10it. On the paper are these words, "Sorry, I don't speak English."