青春期女性发育特点是（） A.月经初潮时卵巢已完全成熟 B.在初潮1～3年内多为无排

在一恒温体积可变的密闭容器中发生如下反应：A(g)+B(g)2C(g) △H<0。t₁时刻达到平衡后，在t₂时刻改变某一条件，其反应过程如图。下列说法正确的是

A．0～t₂时，v_正>v_逆

B．t₂时刻改变的条件可能是加催化剂

C．Ⅰ、Ⅱ两过程达到反应限度时，A的体积分数Ⅰ=Ⅱ

D．Ⅰ、Ⅱ两过程达到反应限度时，平衡常数I<Ⅱ

采用委托加工方式生产加工食品的，可以（）。

A、有证企业委托有证企业

B、有证企业委托无证企业

C、无证企业委托无证企业

阅读理解。

     When a cat is frightened, its heart starts beating faster, its muscles get tense, and there are changes in

the chemicals in its blood stream. If the danger continues, it will defend itself, or it will run away as fast

as possible. Something like this also happens to people.

     When we are excited, angry, scared or aroused by other emotions, our bodies go through many physical

changes, all of which make us more alert and ready to react. We, too, get ready to defend ourselves or run.

Human beings, however, have a problem that animals never face. If we give way to our feelings and let them

take over, we can get into trouble. Have you ever said something in anger-or hit somebody-and regretted it

later? Have you ever shouted at a teacher, told somebody you were lonely, or said you were in love, and then

wished later you had kept your mouth shut? It isn't always wise to express your feelings freely.

      Does this mean that it's smarter always to hide our feelings? No! If you keep the feelings of anger,

sadness, and bitterness hidden away or bottled up inside, your body stays tense. Physical illnesses can develop,

and you can feel disturbed badly inside. It can actual1y be bad for your health.

     Feelings that you keep all bottled up inside don't just go away. It's as if you bought some bananas and stuck

them in a cupboard. You might not be able to see them, but before long you'd smell them. And if you opened

the cupboard, chances are that you'd see little fruit flies hovering all over them. They'd be rotten.

     You can try to treat emotions as if they were bananas in the cupboard. You can hide them and you can

pretend they don't exist, but they'll still be around. And at last you'll have to deal with them, just like those

bananas.

1. By taking a cat as an example, the author wants to show us that _____. [ ]

A. animals can't control their feelings

B. people can't control their feelings

C. people's physical reactions are like those of animals in a way

D. our bodies go through many physical changes in certain situations

2. It's mentioned in the passage that human beings get into trouble because _____. [ ]

A. we are not as alert as animals

B. we sometimes can't control our feelings

C. we always do something wrong to other people

D. we don't pay attention to our physical changes

3. The author wants to tell us in the last two paragraphs that _____.[ ]

A. we won't be able to completely get away from our feelings

B. we should treat emotions like bananas in a cupboard

C. feelings will gradually disappear when we hold them in

D. it's good for our health to keep pleasant feelings

4. What would be the best title for the passage? [ ]

A. Frightened Cats and Human Beings

B. Feelings and Bananas

C. Deal with Feelings Wisely

D. Express Feelings Freely

对生态系统描述不正确的是（）

A.是生物圈内能量和物质循环的一个功能单位

B.是在一定空间范围内，由生物群落及其环境组成

C.生态系统是一个封闭的系统

D.借助于各种功能流（物质流、能量流和信息流）所连接的稳态系统

E.构成生物群落的生物是生态系统的主体

软件项目生命周期是软件产品生命周期的一部分，在软件生命周期的每一个阶段都必须实施有效的项目管理活动。