问题
单项选择题
皮肤的物理辐射散热速度决定于
A．皮肤血流速度
B．环境温度和湿度
C．皮肤温度和环境温度
D．空气对流速度
E．环境温度和环境湿度
答案
参考答案：C
解析：辐射散热，即机体以发射红外线的形式将体热传给外界较冷的物体。辐射散热的条件是：皮温>环境温度。故选C。考点：体热平衡：产热和散热
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皮肤的物理辐射散热速度决定于
A．皮肤血流速度
B．环境温度和湿度
C．皮肤温度和环境温度
D．空气对流速度
E．环境温度和环境湿度
参考答案：C
解析：辐射散热，即机体以发射红外线的形式将体热传给外界较冷的物体。辐射散热的条件是：皮温>环境温度。故选C。考点：体热平衡：产热和散热
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| A young man was going to 1 his holiday in a mountain village. That night he stayed at a small hotel near the train station. 2 going to bed, he went to the owner of the hotel and said, "Excuse me, sir. Will you please 3 me up at a quarter to five tomorrow morning? I'll take the five's 4 " " Oh, sorry," the owner said 5 a hurry, "I am afraid I can't. I won't be able to get up so 6 ." The young man was about to return to his 7 when he stopped and asked, "Do you have an alarm-clock? 8 it can help me." "Yes, here you are, young man." The young man thanked the owner happily. But when he looked at the alarm-clock closely, it seemed there was something 9 with it. "Will it ring 10 time?" The young man asked. "Sure! You just give it a good shake at a quarter to five. And it will ring." | ||||
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