问题
单项选择题
混合物中可燃物质的浓度越低，自燃点（）。
A、越高
B、越低
C、不变
D、不能确定
答案
参考答案：A
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混合物中可燃物质的浓度越低，自燃点（）。
A、越高
B、越低
C、不变
D、不能确定
参考答案：A
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| Once upon a time, a rich man wanted to make a trip (旅行) to another town. He tried not only to take things to sell but also to take money to 1 things with. He 2 to take ten servants (仆人) with him. They would 3 the things to sell and the food to 4 on their trip. Before they started, a little boy ran up to 5 and asked to 6 with them. The rich man said to the little boy, "Well, 7 may go with us. 8 you are the smallest, the thinnest and the weakest of all my 9 , you can't carry a 10 load (担子). You must 11 the lightest one to carry." The boy thanked his master and chose the biggest load to carry. That was bread. "You are 12 ." said his master, "That is the biggest and the heaviest one." The boy said 13 and lifted the load gladly. On the trip they walked for days and at last they got to the town. All the servants were tired 14 the little servant. Do you know 15 ? Most of the bread was eaten during the trip and a little was left when they arrived at the town. | ||||
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