问题
选择题
炎热的盛夏，人赤脚走在沙滩上时，感到烫脚，而踩在水中却较凉，这主要是因为水和沙具有不同的
A．热量
B．内能
C．密度
D．比热容
答案
答案：D
题目分析：水的比热容大于沙子的比热容，在相同的受热条件下，水温度升高的度数少，所以水的温度较低。
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炎热的盛夏，人赤脚走在沙滩上时，感到烫脚，而踩在水中却较凉，这主要是因为水和沙具有不同的
A．热量
B．内能
C．密度
D．比热容
答案：D
题目分析：水的比热容大于沙子的比热容，在相同的受热条件下，水温度升高的度数少，所以水的温度较低。
| Directions: Complete the following passage by using the words in the box. Each word can only be used once. Note that there is one word more than you need. | |
someone's motivation means 1_____ him or her to want to do what you know must be done. A person's motivation 2_____ two things: One is the strength of certain needs. For example, you are 3_____, but you must have a task completed by a nearing deadline. If you are starving, you will eat. If you are 4_____ hungry, you will finish the task at hand. The other is the perception (感觉) that taking a certain action will help 5_____ those needs. For example, you have two burning 6_____ -the desire to complete the task and the desire to go to lunch. Your perception of how you view those two needs will determine which one takes 7_____. If you believe that you could be fired for not completing the task, you will probably 8_____ lunch and complete the task. If you believe that you will not get into trouble or perhaps finish the task in time, then you will be more 9_____ to go to lunch. |
者青睐，鸭脖专卖店发展到5000多处，年销售额达数十亿元。鸭脖加工还带动全省养鸭产业迅速发展，年产值达100多亿元。对此现象认识正确的有