下面是sniffer捕获的数据包根据上图回答问题。该主机上正在浏览的网站是（）。

患儿男，5岁。反复发生肺炎，每年2～3次。平时乏力，活动后气促。胸骨左缘第2肋间可闻及连续性机械样杂音，伴震颤，经超声心动图证实为先天性心脏病，动脉导管未闭。

此患儿系动脉导管未闭，其血流动力学的改变最主要为（）

A.肺循环血流量增加，左心室舒张期负荷加重

B.肺循环血流量增加，右心室收缩期负荷加重

C.肺循环血流量增加，左心室收缩期负荷加重

D.肺循环血流量增加，右心室舒张期负荷加重

E.肺循环血流量增加，左心室、左心房和主动脉血流量减少

有害因素是指能( )或对物造成( )的因素。

A．对人造成伤亡；突发性损害

B．对人造成伤亡；慢性损害

C．影响人的身体健康，导致疾病；突发性损害

D．影响人的身体健康，导致疾病；慢性损害

Before I started school, people felt that 1 was not going to be successful．At the age of four I started speech lessons because basically I could not speak well enough for anyone to understand me．The story goes downhill from here．

The first grade was a struggle．I not only had difficulty speaking, but also felt nervous about the fact that I was expected to learn to read and I just couldn't do it．The second grade was not much better．I still struggled with the inability to read．It was in the third grade that the school district built a new school close to my home．I remember going there with my parents and helping to get the school ready so that we could move to the new one．However, things were still not much better as far as my schooling was concerned and did not get better for the next two years．

It was in the fifth grade．Mrs．Wakefield was my teacher, and if ever there was a teacher that deserved a gold star, it was her．She did not make me feel defeated．On the contrary, she did her best to let me know that I could be whatever I wanted to be．And that is just what I did．

For the past 22 years, I have been a fifth grade teacher．Because of Mrs．Wakefield's influence on my life, I am now encouraging students who have had difficulties in their lives to believe that they can overcome any difficulty and become someone．I have won numerous awards up to now, such as Teacher of the Year．I owe it all to one fifth grade teacher who believed in me and challenged me to be all that I could be．

小题1:The writer ______ when he was in the third grade．

A．did better in reading

B．began speech lessons

C．went to a new school

D．received a high award小题2:We can learn from the passage that the writer ______．

A．is a very successful teacher now

B．thinks teaching is a challenging job

C．has solved problems with his own effort

D．works in the same school with Mrs．Wakefield小题3:What is the writer's purpose in writing the passage?

A．To express his devotion to his work．

B．To show his respect to a special teacher．

C．To share his teaching experience with us．

D．To tell us his story of overcoming difficulties．

办机构具体承办失业保险工作，应履行（）等责任

A.按照规定负责失业保险基金的管理

B.按照规定核定失业保险待遇，开具失业人员在指定银行领取失业保险金和其他补助金的单证

C.拨付失业人员接受职业培训、职业介绍补贴费用

D.国家规定由其履行的其他职责

采用拉轴承器拉轴承时，各拉杆间距离及（）应相等，否则易产生偏斜和受力不均。

A、螺帽大小

B、拉爪大小

C、丝杆长度

D、拉杆长度