2010年10月11日,我国成功发射了“嫦娥二号”探月卫星,卫星在环月圆轨道绕行

题型:计算题

问题:

2010年10月11日,我国成功发射了“嫦娥二号”探月卫星,卫星在环月圆轨道绕行n圈,飞行时间为t,已知月球半径为R0,月球表面处重力加速度为g0

(1)试推导卫星在环月圆轨道上运行时离月球表面高度h的表达式;

(2)地球和月球的半径之比为,表面重力加速度之比,求地球和月球的密度之比;

(3)绕月卫星的最大速度与绕地卫星的最大速度之比。

考点:人造地球卫星计算天体质量与密度
题型:计算题

以下哪种情况不能申请高校国家助学金?()

A、家庭经济困难

B、家庭突发变故

C、学习生活不成负担

D、学习成绩合格

题型:计算题

按时间先后,排列下列历史事件正确的是

①中华民国成立②袁世凯篡权③中国同盟会成立④武昌起义  [ ]

A.④③①②    

B.②④③①    

C.①③④②    

D.③④①②

题型:计算题

If  you are  interested  in  becoming  a  registered  nurse,  you  are  most likely  aware that there are certain qualifications to become one.

Knowing the educational requirements to  be  a registered nurse  is the first step you   will  need  to take  in  your journey to  become  a  RN.  You will  need to  complete  a prescribed program  of study.The  education that the promising  registered  nurse  chooses  will depend on if he or she is interested in getting further education.

One of the most getting forms of education for registered nurses is an associate degree in  nursing  which takes  about two  years to  complete.  Other  RN  candidates  may  choose  a hospital diploma program where they take 30 to 60 hours worth of science classes and then take  many more hours of classes which are heavily focused on nursing.The diploma program usually  takes  a minimum of three years.  A diploma program meets the  basic  educational requirements to be a registered nurse.

Another choice is for the promising RN to get a Bachelor of Science degree in Nursing    from a university.Once a BSN degree is earned,it gives the person the opportunity to get     higher education opportunities in his or her field such as a Master’s Degree or a PhD.

The registered nurse educational requirements can vary from state to state in America     as each state has its own laws and policies that govern the nursing profession.However,all     registered nurses must take some sort of licensing exam in order to become legally able to     practice in the registered nursing profession.

While 2 to 3 years of training is required,it is possible to make a good living from the salary that you can earn as a registered nurse.But be aware that the profession can be     stressful.Some of the most stressful nursing positions are those in hospitals,particularly in     the emergency rooms.Some less stressful jobs may include working in private practice where     the hours will not be as long. 

66.The main idea of this article is to talk about——.

A.the most promising profession in the future

B.educational requirements to be a registered nurse

C.the nursing profession in different states

D.some useful information for future professions

67.According to this article,most people who want to be registered nurses prefer to go in for __________________ .

A.an associate degree           B.a hospital diploma program   、

C.a Bachelor of Science degree D.a Master’s or a PhD’s degree

68.It can be concluded from this article that ___________________.

A.a hospital diploma program takes the least time to finish compared with others

B.it’s really not difficult for people to be educated to become registered nurses

C.registered nurses are not legal unless they take some sort of licensing exam

D.being a registered nurse is the most stressful profession in America

69.What’s the writer’s attitudes towards being a registered nurse?

A.Subjective    B.Objective    C.Supportive   D.Opposing

70.If another paragraph is needed,it most probably deals with——.

A.how the nursing profession is managed by the government

B.different forms of degrees for being a registered nurse    ‘

C,the advantages and disadvantages of being a registered nurse

D.discussion about the different types of registered nurses

题型:计算题

患儿男,3天,足月顺产,生后5小时出现反复抽搐,皮肤轻度黄染,面部较长,眼距宽,耳位低,耳廓有切迹,下颌小。B超检查患儿房间隔缺损。血白细胞8.5×109/L,中性90%,淋巴10%。

治疗方法最好选择()

A.早期喂葡萄糖水

B.蓝光照射

C.甘露醇降低颅内压

D.骨髓移植

E.手术治疗房间隔缺损

题型:计算题

建筑施工项目管理的目的是()

A.压缩工程成本

B.实现工程各项目目标

C.提高工程利润

D.保证工期、质量

更多题库