据新华网报道，市场的非理性消费使虫草、和田玉等稀缺性资源步入开发的恶性循环：越挖越少，越少越贵，越贵越挖……给当地带来了不可逆转的生态和资源灾难。
虫草、和田玉等地方名贵特产“越贵越挖”，给当地带来生态和资源灾难的现象（   ）
①违背了价值规律的要求                 ②是价值规律发生作用的结果
③是市场经济自发性、盲目性的表现       ④表明商品的价格有供求关系决定

北京某经贸团赴东南亚参加订货会，下列产品最有可能出现在订货合同中的是（  ）

回答下列(1)、（2）小题：

短文填空。

    Hello, my name is Jack. I am a ____in No.1 Middle School. In my free time(空余时间), I like ____sports .I like playing tennis and basketball.

    Look ____ my bedroom. I have a tennis racket.____ is on the table. I have two basketballs. They are ____ the bed. Playing sports is very ____, so I like it very much. I also like eating. Among(在...中间)fruits, I like bananas ____. But I ____ like
vegetables. I like French fries very much. So I am very fat. The doctor asks me to eat more ____ food and do more ____.

下列图形中，属于内能转化为机械能的是（   ）