自来水是城镇居民用水来源，水厂从自然界取水，经过一系列处理后，通过管道到达居民家

在风险确定的前提下，追求税后利润最大化是财务管理的基本要求。 ( )

患者男，50岁，少尿、腹胀、下肢水肿2月，以往有“乙型肝炎史”。腹部膨隆，肝、脾触诊不满意，肝浊音界右锁骨中线第4肋间，移动性浊音（+）。肝功能检查：ALT80U/L，白蛋白25g/L，球蛋白35g/L，A/G0.71。

肝硬化腹水治疗推荐每天盐摄入（）。

A.4g

B.5g

C.6g

D.＜2g

E.3g

F.不限

跳伞运动员离开飞机后，若立即张开伞在空中下落，已知降落伞在下落过程中所受空气阻力随其运动速度的增大而增大，在整个下落过程中，他机械能的变化情况是 

A．势能减小，动能增加，机 械能不变

B．势能减小，动能减小，机械能减小

C．势能减小，动能先增加后不变，机械能减小

D．势能减小，动能先减小后增大，机械能不变

十二指肠溃疡的好发部位是( )

A．壶腹部
B．升部
C．球部
D．降部
E．水平部

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.