向量可以描述成（）。 A.固定长度的数组 B.可变长度的数组 C.一种队列 D.一种

（7分）（1）今有A、B、C三种二甲苯；将它们分别进行一硝化反应，得到的产物分子式都是C₈H₉NO₂,但A得到两种产物，B得到三种产物，C只得到一种产物。由此可以判断A、B、C各是下列哪一种结构，请将字母填入结构式后面的括号中。

（2）根据分子的相对分子质量M可以推测有机化合物的结构简式。若某种含C、H和卤素的化合物的M为48，写出其结构简式____________

（3）现有某种含C、H和卤素的化合物，测得两个M值，分别为64和66。分别写出它们的结构简式_____________________________________________________________

在推测有机化合物的结构时，可能用到的含量较多的同位素的质量数如下表：

醉驾酿就的恶性交通事故，一段时间以来此起彼伏。严厉打击酒后驾驶违法行为将坚持不懈地抓下去，实现常态化，这是对人民生命安全高度负责的态度。依据国家相关法律，从2011年５月１日起，醉驾一律吊销驾照并追究刑责。

为了预防恶性事故的发生，宁波市交警部门一方面坚决扼杀“马路杀手”，严厉查处醉驾者。一线民警一旦发现驾驶者存在酒驾嫌疑，依然按照常规进行呼吸检测，若酒精含量大于或等于８０ｍｇ／１００ｍｌ，则马上进入更为严格的验血环节，抽血后，驾驶者血样一律由宁波市公安局专设的检验机构来完成，并出具具有法律效力的检测报告。另一方面还组织交警、志愿者深入餐饮企业面对驾车人员“零距离”宣传醉驾危害，把查处与宣传相结合，营造交通安全良好氛围，确保平安。

结合上述材料，运用政治生活有关知识，说明宁波市交警部门在整治醉驾问题上发挥了怎样的作用？（12分）

Dearest Mom and Dad,

I'm afraid I have some very bad news for you. I have been very naughty and the school principal is very angry with me. She is going to write to you. You must come and take me away from here. She does not want me in the school any longer.

The trouble started last night when I was smoking a cigarette in bed. This is against the rules, of course. We are not supposed to smoke at all.

As I was smoking, I heard footsteps coming towards the room. I did not want a teacher to catch me smoking, so I threw the cigarette away.

Unfortunately, the cigarette fell into the waste-paper basket, which caught fire. There was a curtain near the waste-paper basket which caught fire, too. Soon the whole room was burning.

The principal phoned for the fire department. The school is a long way from the town and by the time the fire department arrived, the whole school was in flames. Many of the girls are in the hospital.

The principal says the fire was my fault and you must pay for the damage. She will send you a bill for about a million dollars.

I am very sorry about this.

Much love, Sarah

P.S.

None of the above is true, but I have failed my exams. I just want you to know how bad things could have been!

小题1:Sarah wrote to her parent______

A． to inform them about an accident

B． to ask them for money

C． to them wonderful news

D． to tell then she had failed her exams小题2:Sarah told her parents the story about the fire because______

A．she wanted to make them worried

B．she wanted them to have some fun

C．she wanted to make them less angry at the real news

D．she wanted to make them even more angry小题3:The main body of the letter was_____

A．mostly true

B．partly true

C．all true

D．completely untrue小题4:Sarah said the principal was angry because____

A．she had failed her exams

B．it was her fault that the fire had broken out

C．she not make the phone call in time

D．she had caught her smoking in bed

开发、利用出版信息资源的途径有多种，其中常见的有（）。

A.建立数据库和计算机网络

B.策划新选题

C.对编辑出版队伍进行继续教育

D.对已有出版物进行再次开发

E.进行著作权贸易

反映财务效益状况的修正指标有（）。

A.净资产收益率

B.资本保值增值率

C.总资产报酬率

D.主营业务利润率

E.成本费用利润率