根据短文内容，从A、B、C、D四个选项中选择正确答案填空。

    Children often  1 this game. They play it like this: Six 2 stand in a row(排) 3 the class. They put their hands 4 their backs(背), so you can't see their hands. The teacher gives one of them 5 rubber. The rubber goes 6 one student to another -- first one way, then the other. They must keep their hands behind their backs. The other students in the class keep their eyes    7. They can't look.

    Then the teacher says: “Stop and put your hands  8 you now.” Now the other students 9 their eyes, and guess who has the rubber. They ask questions like: “Li Lei, is it in  10 right hand?” They can have only five guesses.

人们为了防止鸟类吃草籽，把一片草地用网罩起来，结果却使食草昆虫大量繁殖，草的叶子几乎被吃光，产生这种现象的原因是（  ）

阅读以下描述步骤过程，回答下面的问题．

①星期天，小明从街上买了两袋橘子，高兴的提着回家．

②干完活，他做了下屈肘．

③然后，愉快的伸了个懒腰．

请回答：

关于物体内能、温度和热量，下列说法正确的是（　　）