在如图所示的四个电场中,均有相互对称分布的a、b两点,其中a、b两点电势和场强都

题型:选择题

问题:

在如图所示的四个电场中,均有相互对称分布的a、b两点,其中a、b两点电势和场强都相同的是(  )

A.

B.

C.

D.

考点:电场强度的定义式电势
题型:选择题

已知一次函数y=kx+2,请你补充一个条件(    ),使y随x的增长而减小。

题型:选择题

8岁男孩,因浮肿,尿少一周来门诊,查体可见全身明显浮肿,下肢指压痕明显,阴囊水肿较重,血压14/10kPa(105/75mmHg),尿蛋白(++++),尿中RBC0~4个/HP,此患儿浮肿的原因主要是()

A.肾小球滤过率下降

B.低蛋白血症

C.ADH分泌增加

D.醛固酮分泌增多

E.肾小管对钠的重吸收增多

题型:选择题

在滚动式计划中, (35)

A.为了保证项目里程碑,在战略计划阶段应做好一系列详细的活动计划

B.远期要完成的工作在工作分解结构最上层详细规划

C.近期要完成的工作在工作分解结构最下层详细规划

D.关注长期目标,允许短期目标作为持续活动的一部分进行滚动

题型:选择题

Losing a job or not being able to find one almost always brings unwelcome changes. If you’’ve lost a job, the first feeling is often one of shock. On top of the loss of income, many people find the whole routine of their life is shattered, their contact with other people reduced, their ambitions halted and their identity as a worker removed.There may be good feelings too — it’’s nice to be able to lie in bed in the morning, to spend more time with children, or to have more time to think — a better job may be just around the corner. But, unless a better job does turn up, chances are the days start getting longer and the time becomes harder to fill. Many people pass through periods of difficulty in sleeping and eating. They feel irritable and depressed, often isolated and lonely.Despite all these problems, unemployment can be a chance for a fresh start. You can discover that it provides an opportunity to sort out or rethink what you want from life and how best you can get it. You can use the time to plan how to find a new job, learn a new skill, develop your hobbies, see if you can run your own business, do some voluntary work in your community or meet new people. It’’s up to you.

Unemployment provides a chance for you to rethink ________.

A.what you find and how to keep it

B.what you want and how to get it

C.how best you can do the new job

D.how best you can sort out a new job

题型:选择题

空中交通服务报告室应不迟于飞行前一日()点以前先向中国民航局或者民航地区管理局的航行主管部门以及有关的管制室、报告室发出飞行预报。

A.15

B.16

C.17

D.19

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