清政府在两次鸦片战争中失败的根本原因是[ ] A、清政府的武器装备落后 B、清政

Do you ever find yourself getting really unhappy for almost no reason? Or suddenly feeling down without knowing why? Going from sadness to anger to joy in a matter of minutes can make many teens feel as though they're losing control. But why is the feeling so common among teens?

Maybe you're starting a new school and not able to see old friends as much. Getting good grades or wanting to be better in sports or other activities can be a concern (关注)for many teens.

Being accepted by friends is important. Teens also may notice, for the first time, a sense of distance from parents and family. You may feel you want to be on your own and make your own decisions, but it can also seem a bit lonely at times.

Another important cause for mood swings is biology. When puberty（青春期）begins, the body starts producing hormones（荷尔蒙）. These hormones cause physical changes in the body. But in some people, they also seem to cause emotional(情绪的)changes.

Here are some things you can do that might make those bad moods a bit easier to deal with.

Recognize you're not alone. Although not every teen experiences mood changes to the same degree, they are common.

Talk to people you trust. Friends can help each other by realizing that they're not alone in their feelings. Talking to parents is important, too. Parents can share their own experiences dealing with bad moods. Teachers are often good resources and a doctor can help to answer questions about development.

Get enough sleep. Though it can be hard to find enough time, getting enough rest is very important. Being tired can lead to more sadness.

Create. Taking part in some kinds of activities, like building something out of wood, or starting an art or music piece. Writing can help you organize and express your thoughts and feelings. Get your thoughts on paper. Do the same thing with paint, music, or other art forms. Put your feelings into your artwork.

小题1:When puberty begins, many teens feel__________.

A．unhappy

B．angry

C．joyful

D．emotional小题2:_______may not make some teens be in bad moods.

A．Study pressure

B．Getting good grades

C．The sense of distance from parents

D．Missing old friends小题3: It’s easier to deal with your mood changes by ___________.

①realizing they are common     ②explaining your feelings to people you trust

③playing computer games        ④being creative

⑤breaking school rules         ⑥getting enough sleep

A．①②③④

B．①②③⑥

C．①②④⑥

D．①③④⑤

急性化脓性骨髓炎患者，经抗生素治疗48～72小时无效，此时应采取的处理方法是（）。

A.改用广谱抗生素

B.加大抗生素的用药量

C.加强营养

D.输血

E.手术钻孔或开窗引流

马立克氏病毒在鸡体内以两种方式存在：（）。

一农民在秋收季节参加麦收，当地老鼠较多，几天秋收下来，该农民出现寒战，高热伴头痛、腰痛、眼眶痛，2～3天后病人又出现眼结膜充血和颈背部皮肤潮红充血，呈酒醉貌。该病人可能患有（）

A.肾综合征出血热

B.急性出血性结膜炎

C.新疆出血热

D.登革出血热

E.乙型脑炎

下列关于RA的全身表现的描述中，错误的是：（）

A.血管炎可发生在任何系统

B.类风湿结节可发生在关节部位，与疾病活动无关

C.肺纤维化是常见的肺病变

D.可有心脏受累，以心包炎最常见

E.可引起周围神经病变