儿童在知道“青菜、萝卜、菠菜”等概念之后，再学习“蔬菜”这个概念．这是( )A．下位

可疑子宫内膜结核应在( )

A．月经来潮第3天行诊刮
B．月经来潮第5天行诊刮
C．经前1周内行诊刮
D．月经中期行诊刮
E．诊刮日期不全限制

纳斯达克股票市场是世界上最早的证券交易所。

巴金的长篇小说代表作品是（）

A.《金华烟云》

B.《随想录》

C.《激流三部曲》

D.《旅途随笔》

双组底漆一般的干燥温度（）℃，时间是30min。

A.20

B.60

C.80

D.120

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.