最近“纸火锅”(如右图)逐渐流行起来。“纸火锅”是用纸张代替金属材料做容器盛放汤料，当酒精燃烧时纸张不会燃烧。对此现象，下列解释合理的是（）

   When Bill is very young, he loves picture. His mother often draws some for him on old pieces of paper. She is very bad at drawing, but bill likes her pictures and always wants more. Then, when he is a little older, Bill’s mother gives him some pencils and a drawing book, and he begins drawing pictures, too. But they are never good .When Bill is five years old, his mother gives him a small blackboard and some pieces of a baby on the blackboard, he draws lines(线条) and rubs(擦) them out too for ten minutes , but when he looks at his picture , he is not happy. “Well”, he says at last(最后) to his mother, “I’ll put a tail(尾巴) on it and make it a monkey.”

如图，⊙O的半径为5，弦AB的长为6，M是AB上的动点，则线段OM长的最小值为（　　）

阅读下面短文，在空白处填入一个适当的词，或填入括号中所给单词的正确形式。

    In much of Asia, especially the so-called “rice bowl” cultures of China, Japan, Korea, ____Vietnam, food is usually eaten with chopsticks.

    Chopsticks are usually two long, thin pieces of wood or bamboo. They can also be made of plastic, animal bone or metal. Sometimes chopsticks are quite artistic. Truly elegant chopsticks might ____ (make) of gold and silver with Chinese characters. Skilled workers also combine various hardwoods and metal ____ (create) special designs.

    The Chinese have used chopsticks for five thousand years. People probably cooked their food in large pots, ____ (use) twigs（树枝）to remove it. Over time, ____ the population grew, people began cutting food into small pieces so it would cook more quickly. Food in small pieces could be eaten easily with twigs which ____(gradual) turned into chopsticks.

    Some people think that the great Chinese scholar Confucius, ____ lived from roughly 551 to 479 B.C., influenced the ____ (develop) of chopsticks. Confucius believed knives would remind people of killings and ____ (be) too violent for use at the table.

    Chopsticks are not used everywhere in Asia. In India, for example, most people traditionally eat ____ their hands.