一般资料：求助者，男性，41岁，高中毕业，已婚。案例介绍：半年多前的一天，求助者到银

Have you had a headache during a test Have you ever been so worried about something that you have a headache or even can’t sleep at night If so, then you know what stress is. Stress is what you feel when you are worried about something. This worry in your mind can make your body feel bad. You may feel angry, sad, scared, or afraid—all of which can give you a stomachache or a headache.
However, there are different kinds of stress. Some kinds of stress are good and others are bad. Good stress might happen when you’re called to answer questions in class or when you have to give a speech. This kind of stress can help you to get things better done. For example, you may do a better job on your test if the stress pushes you to prepare better before the test.
On the other hand, bad stress can happen if stress lasts too long. You may not feel well if your parents are fighting, if a family member is sick, if you’re having problems at school, or if anything else makes you unhappy every day. That kind of stress isn’t going to help you. And it can actually make you sick.
The best way to fight stress is to have a balanced life. Make sure you keep your SELF in mind: Sleep, Exercise, Leisure(休闲), and Food. If you get enough sleep and eat properly, and if you exercise and leave time for fun, you’ll probably feel less stressed.

拖拉机的油箱有油100升，每工作1小时耗油8升，则油箱的剩余油量y（升）与工作时间x（时）间的函数关系式为______．

统计描述的重要工具是（）

A.统计指标的计算

B.统计推断的方法

C.统计表和统计图

D.调查设计和实验设计

E.疾病统计和死亡统计

下面不属于第三代移动通信系统标准的是______。

A．TD-SCDMA

B．WCDMA

C．CDMA2000

D．EDGE

放射工作人员是指在放射工作单位从事放射职业活动中受到（）的人员。