问题
选择题
关于地球自转的周期和速度的叙述正确的是[ ]
A． 地球自转360°所需的时间为24小时，这叫做1个太阳日
B． 地球自转一周360°称为1个恒星日
C． 地球上各地自转的角速度都为每小时15°
D． 地球自转的线速度总是纬度高的地方大于纬度低的地方
答案
B
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关于地球自转的周期和速度的叙述正确的是[ ]
A． 地球自转360°所需的时间为24小时，这叫做1个太阳日
B． 地球自转一周360°称为1个恒星日
C． 地球上各地自转的角速度都为每小时15°
D． 地球自转的线速度总是纬度高的地方大于纬度低的地方
B
| Stress is with us all the time. It comes from mental or emotional activity as well as physical activity. It is unique and personal to each of us. So personal, in fact, that what may be relaxing to one person may be stressful to another. For example, if you’re a busy executive who likes to keep occupied all of the time, "taking it easy" at the beach on a beautiful day may be extremely frustrating, nonproductive, and upsetting. You may be emotionally distressed from "doing nothing." Too much emotional stress can cause physical illnesses such as high blood pressure, ulcers, or even heart disease. Physical stress from work or exercise is not likely to cause such ailments. The truth is that physical exercise can help you to relax and to better handle your mental or emotional stress. |
Which of the following would be a determinant as to what people find stressful
A．Personality.
B．Education.
C．Marital status.
D．Shoe size.