“12: 45”reads(读作) ________.

有学者认为：在我国封建城市形成的过程中，社会分工的发展和商品经济的繁荣并没有起决定性的作用。据所学推断，真正起关键作用的因素最有可能是（    ）

（2015•菏泽）世界上很多发明都是受到生活现象的启发而蒙生的创意，比如：蒸汽机和汽油机，它们工作时，能的转化过程是____ ．图中____ 是汽油机的工作原理图．

⑴What did you do last night?____                  A. I got there by bus.

⑵How tall are you?____                                   B. I'm 1.60 metres.

⑶How did you get there?____                         C. I went to the Great Wall.

⑷Where did you go last weekend?____          D. I hurt my leg.

⑸What happened to you yesterday?____       E. I watched TV.