以长为8，宽为6的矩形各边中点为顶点的四边形的周长为______．

Sydney Australia—Mobile phone has become a problem for middle schools. Some middle schools in Australia have banned students from carrying mobile phones during school hours.

Mobile phone use among children has become a problem for the school this year. Several children have got mobile phones as Christmas gifts, and more students want them.

Mary Bluett, an official, said mobile phone use is a distraction（分心的事）to students during school hours and it also gives teachers so much trouble in their classrooms. Teachers were also saying that sometimes students might use phone messages to cheat during exams.

She said some schools had tried to ban mobile phones. Some parents felt unhappy because they couldn’t get in touch with their children.

Many teachers said students should not have mobile phones at school, but if there was a good reason, they could leave their phones at school offices. They also said there were many reasons why the students should not have mobile phones at school: they were easy to lose and were a distraction from studies.

Many people say that they understand why parents would want their children to have phones, but they think schools should let the students know when they can use their mobile phones.

小题1:Some middle schools in Australia have banned students from carrying mobile phones________.

A．because they are students

B．when they are free

C．when they are at school

D．because they are young小题2:We know from the passage that some children get mobile phones from________.

A．the makers and sellers

B．some other strangers

C．their parents and friends

D．some mobile phone users小题3:Some parents felt unhappy because they couldn’t _______ during school hours.

A．use their mobile phones

B．leave their mobile phones

C．help the teachers with their work

D．get in touch with their children小题4:The underlined word “they” in the fifth paragraph refers to________.

A．many teachers

B．some messages

C．mobile phones

D．some students

经纬仪望远镜视准轴检验校正的目的是（）。

A、使视准轴平行于水平轴

B、使视准轴垂直于水平轴

C、使视准轴垂直于水准管轴

D、使视准轴平行于竖轴

女，64岁，曾被诊断为"轻型"糖尿病，用饮食管理即能控制血糖在"正常范围"，近10天因口齿不清，在外院诊断为"脑血管意外"，昏迷2天后转入本院治疗

在本院急诊室考虑病人为某一种糖尿病昏迷，在鉴别诊断时，应首先进行的检查是（）

A.头颅CT、或MRI

B.脑脊液检查

C.动脉血气分析

D.血糖、电解质、肾功能检查

E.糖化血红蛋白测定

男，30岁，高空坠落伤1小时，患者烦躁不安，呼吸困难，口唇发紫，有三凹征，右股骨开放性骨折，血压80/40mmHg。对其应首先处理的是（）

A.救治窒息

B.抗休克

C.固定骨折

D.包扎伤口

E.镇静止痛

大气环境容量与污染物总量控制要结合开发区规划分析和污染控制措施，提出区域环境容量利用方案和( )污染物排放总量控制指标。

A．远期



B．长远
C．中期



D．近期