当n大于100时,总体率95%的可信区间估计为() A.ρ±1.65Sp B.ρ±1

题型:单项选择题

问题:

当n大于100时,总体率95%的可信区间估计为()

A.ρ±1.65Sp

B.ρ±1.96Sp

C.ρ±2.58Sp

D.ρ±1.96S

E.ρ土2.58S

考点:临床医学检验临床免疫技术医学统计学医学统计学题库
题型:单项选择题

下列哪项症状不是系统性硬化病的特征性表现()

A.手指皮肤病变

B.反流性食管炎

C.肾危象

D.面部皮疹

E.肺动脉高压

题型:单项选择题

     "A very disruptive(制造混乱的) sixyearold child kicked my legs and clawed at my hand," said one

teacher. "I broke up a fight and was kicked between my legs," said another. Many people have heard

stories like this. But the situation is more worrying still and it involves parents.

     Every child, regardless of the circumstances into which they are born, has the right to achieve their

potential, regardless of their parents' wealth and class. And we recognize that, as a nation, it is a long

way to achieve this goal. But rights come with responsibilities and what worries people is that we are in

danger of neglecting the latter.

     Far too many children are behaving badly at school, even to the point of being violent to staff. This

is terrible enough, but it is hard to be surprised since many children are just mirroring the behavior of

their parents. Too many are starting school unable to hold a knife and fork, unused to eating at a table, 

 and unable to use the lavatory properly.

     We are in danger of becoming a nation of families_living_separate_lives_under_one_roof. The

bedroom, once a place to sleep,  has become the living space for the young. Spending hours in front

of computer screens, on social networking sites or being immersed in computer games, children and

young people spend little time with their parents. Parents are unable to monitor just what their children

are watching.

     Schools cannot right the wrongs of society and teachers cannot become substitute parents. Both

parties need to work together. Parents must be helped and given confidence to take back control. They

are responsible for setting boundaries for their children's behavior and sticking to those boundaries when

the going gets tough. They are responsible for setting a good example to their children and for devoting

that most precious of resources-time-so that children come to school readily and are willing to learn.

1. In the opinion of the writer, what problem do people ignore?

A. The school violence.

B. The pressure of students' learning.

C. The right to achieve students potential.

D. The responsibilities of the students.

2. The writer's attitude to the behaviors of parents may be that of ________.

A. dissatisfied  

B. unconcern

C. understanding  

D. tolerance

3. The underlined part in Para. 4 means________.

A. parents and children live in their separate rooms

B. parents care little about children's life at home

C. children don't live with their parents in the same room

D. at home children live a different life from that of parents

4. From the last paragraph, we can infer that ________.

A. schools can't correct the wrongs that society does to teachers

B. teachers have no responsibility for playing the role of parents

C. parents should spend time with children making them ready to learn

D. students are responsible for making themselves known in society

5. What't the main idea of the passage?

A. Children's behavior at school is worrying people.

B. Parents expect schools to correct their children's bad habits.

C. There is no point in parents' teaching children at home.

D. Don't blame teachers when it's parents who are failing.

题型:单项选择题

( )就是工程参与各方在项目建设全过程中,运用现代信息和通信技术及合适的手段,相互传递、交流和共享项目信息和知识的行为及过程。

A.信息流通过程
B.信息传递过程
C.信息管理过程
D.信息转化过程

题型:单项选择题

自动准同步装置发降压脉冲时,必须同时闭锁_________脉冲。

题型:单项选择题

无火焰原子吸收分光光度计的石墨炉利用()来加热石墨管

A、高压

B、低压

C、低电流

D、大电流

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