测得某水样的酚酞碱度为12.0mmol∕L,总碱度为14.0mmol∕L,则该水样中

题型:填空题

问题:

测得某水样的酚酞碱度为12.0mmol∕L,总碱度为14.0mmol∕L,则该水样中的含有()离子,其含量为()。

考点:锅炉水处理工锅炉水处理工题库
题型:填空题

与正常细胞相比,癌细胞[ ]

A.不再分裂

B.呼吸作用降低

C.可以无限增殖

D.水分减少

题型:填空题

     "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:填空题

网络企业的总收益是由()的总卖价构成。

A、销售网络产品

B、提供信息服务

题型:填空题

路两侧的车行道边缘白色实线是什么含义?

A.机动车可临时跨越

B.非机动车可临时跨越

C.车辆可临时跨越

D.禁止车辆跨越

题型:填空题

在为滋养细胞疾病--葡萄胎处理原则中,哪项不正确()

A.吸宫手术前做好输液,输血准备

B.两次刮宫术应间隔7日

C.术后须给予抗生素

D.预防性化学治疗应作为治疗常规

E.每次刮出物送病理检查

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