膨胀阀与孔管有什么区别？

“Teenager” means a person from 13 to 19 years old. Although they’re young, they have to make many important choices by themselves. Often teachers and parents cannot handle them because they don’t understand and know teenagers, especially their wishes, problems or different moods in a short time. They need to think about questions like these: Should we go to college? What kind of job do I want? However, other people also influence their choices. Who influences teenagers?

It depends on the kind of choice. When teenagers buy things, friends are the most important influence. This is especially true for clothes and music. TV shows, advertisements and parents also influence teenagers. In more serious things, parents are probably the most important influence. Some teenagers say it’s best to regard both parents and friends as influences. James, a seventeen-year-old boy says he’s “just a crazy man”. He also says, “Parents are really important because they can tell you what’s right and wrong.”

But teenagers also feel they need to make choices—to make their own mistakes. As one teenager girl said, “If our parents don’t let us make our own choices, maybe in the future we don’t know how to do it.” And they feel friends can often be a big help, especially because friends sometimes know more about their situation than their parents.

小题1: Why do teenagers sometimes have to make their own choices?

Because the teachers want them to do it.

Because their parents want them to do it.

Because teenagers like to make choices by themselves.

Because teachers and parents don’t understand them well.

小题2: Who influences most to the teenagers when they buy music?

A．Their teachers.

B．Theirs parents.

C．Their friends.

D．Movie stars.小题3: What does the passage mainly talk about?

Everybody needs to make choices.

Teenagers need to make choices by themselves.

Teenagers know more about TV shows and music.

Teachers and parents should help teenagers as much as possible.

在出口业务中，保险单日期不能迟于海运提单日期。( )

在卫星通信过程中，用基带信号对正弦波的频率实行控制，并使之按其所控信号的变化规律做相应地变化，此种过程为（）调制过程。

A.频率调制

B.脉码调制

C.增量调制

急性肾衰竭无尿期或少尿早期，发生水中毒的常见原因是（）

A.内生水增多

B.低蛋白血症

C.血管升压素（抗利尿激素）增加

D.不适当输入过多水分

E.出汗太少

下列人格测验中属于客观测量方法的是( )。

A．社会距离量表

B．完成句子测验

C．场独立性—依存性测验

D．情景压力测验