. The manager said that they had an _____ plan if the plan they had submitted was not accepted.

在动物的进化历程中，最早成为真正陆生脊椎动物的是（    ）

我国东部沿海某地等高线图，此地距某中等城市约五公里。读图完成要求：

下列试剂中：①氧化铜粉末、②石灰石块、③锌粒、④试剂瓶中的盐酸。可以用药匙取用的是____，可以用镊子取用的是____，可以用滴管取用的是____。

给下列图片排序。    There are some special days in a year.New Year's Day is in January.Then Tree Planting Day comes after Women's Day.Children like June best.Because Children's Day is in June.Dragon Boat Festival (端午节) always comes after Children's Day.I like Children's Day，because I can play many games and get some gifts from my parents on that day.In September we have Teachers' Day.And in October，we have China's National Day.
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