同一牙齿各部分颜色是不同的，下列说法正确的是（）。 A.切端彩度最低 B.中部彩度最

窗帘：隐私

A．文件：机密

B．日记：心情

C．消防栓：火警

D．防护栏：安全

1814年11月29日，正当《泰晤士报》的手工印刷工人准备工作时，社长竟向他们出示了一份印好的报纸，并骄傲地对工人们说“本期报纸在一个小时内就印刷完毕，这是印刷术发明以来的最大成就。”四位同学对这则材料发表了如下的意见

甲说：这不可能，活字印刷术在19世纪还没有传入西方呢。

乙说：这太夸张了，不可能在这么短霎时间内印好报纸。

丙说：这是可能的，工业革命使机器生产的效率明显优于传统手工方式。

丁说：我也认为是真实的，因为我听说这则材料来自于一位学者的著作。

哪一位同学的意见最为合理？[ ]

A．甲

B．乙

C．丙

D．丁

It’s not easy being a teenager（13至19岁青少年）—nor is it easy being the parent of a teenager. You can make your child feel angry, hurt, or misunderstood by what you say without realizing it yourself. It is important to give your child the space he needs to grow while gently letting him know that you you’ll still be there for him when he needs you.

Expect a lot from your child, just not everything. Except for health and safety problems, such as drug use or careless driving; consider everything else open to discussion. If your child is unwilling to discuss something, don’t insist he tell you what’s on his mind. The more you insist, the more likely that he’ll clam up. Instead , let him attempt to solve（解决）things by himself. At the same time, remind him that you’re always there for him should he seek advice or help. Show respect for your teenager’s privacy （隐私）. Never read him his mail or listen in on personal conversions.

Teach your teenager that the family phone is for the whole family. If your child talks on the family’s telephone for too long, tell him he can talk for15 minutes, but then he must stay off the phone for at least an equal period of time. This not only frees up the line so that other family members can make and receive calls, but teaches your teenager moderation（节制）. Or if you are open to the idea, allow your teenager his own phone that he pays for with his own pocket money or a part –time job

68. The main purpose of the text is to tell parents _____________.

A. how to get along with a teenager

B. how to respect a teenager

C. how to understand a teenager

D. how to help a teenager grow up

69. What does the phrase “clam up” in Paragraph 2 probably mean?

A. become excited            B. show respect

C. refuse to talk                    D. seek help

70. What should parents do in raising a teenager according to the text?

A. Nor allow him to learn driving or take drugs

B. Give him advice only when necessary

C. Let him have his own telephone

D. Not talk about personal things with him

下面关于USB的叙述中，错误的是______。

A．USB接口的外表尺寸比并行接口大得多

B．USB 2.0的数据传输率大大高于USB 1.1

C．USB具有热插拔与即插即用的功能

D．在windows XP下，使用USB接口连接的外部设备(如移动硬盘、U盘等)不需要驱动程序

男孩，10岁，课间玩耍时不慎被同学推倒，头部着地，当时面色苍白，出冷汗，神志不清，5分钟后清醒，头部外观无伤痕，醒后对受伤时情况回忆不清，各项生命体征平稳。

最可能的诊断是（）

A.脑震荡

B.硬膜外血肿

C.硬膜下血肿

D.原发性脑干损伤

E.脑挫裂伤