在天气晴朗时，珠峰顶常飘浮着形似旗帜的乳白色烟云，这就是珠峰旗云。旗云是由对流性积云形成，可根据其飘动的位置和高度，来推断峰顶风力的大小。读图，峰顶形成对流运动的直接热源是（    ）

教师tea____he____ 

如图所示是新疆的主要地形区，排列正确的是（  ）

A

    Today is August 3rd. Tomorrow (明天) is Peter's grandfather's birthday. It is his 73rd birthday. Peter's two sisters, Sally and Tina, and Peter buy some things for their grandfather this afternoon. Sally buys a nice birthday card. And she writes(写) “Happy birthday” on it. Tina buys a blue shirt from a clothes store. It is $29. Peter buys some fruits and a set of books. The name of the books is Harry Potter (哈里波特)

①酸性氧化物与碱发生反应②弱酸与盐溶液反应可以生成强酸③没有水生成，也没有沉淀和气体生成的复分解反应④两种酸溶液充分反应后的溶液体系为中性 ⑤有单质参加的非氧化还原反应⑥两种氧化物反应的产物有气体．