某医务室随机测量了10名男生的胸围和肺活量,已知胸围和肺活量均服从正态分布,则如需对

题型:单项选择题

问题:

某医务室随机测量了10名男生的胸围和肺活量,已知胸围和肺活量均服从正态分布,则

如需对资料进行假设检验,其无效假设是

A.π1=π2

B.μ1=μ2

C.μd=0

D.ρ=0

E.ρ≠0

考点:公卫执业助理医师公卫执业助理医师
题型:单项选择题

E

Support for renewable energy technology to figllt global warming is weakening in the face of

worldwide economic problems and the true scale of the carbon reductions required,a survey pub-

lished today has suggested.

Figures presented at the UN climate talks in Poznan,Poland,show that climate experts have

less faitll in alternative energy than they did 12 months ago.

The survey shows less support for wind energy,solar power,biofuels,biomass and hydrogen

energy as technologies with“high potential”to reduce carbon levels in the atmosphere over the next

25 years.

Eric Whan of Globesean,which carried out t}le survey of“climate decision makers”.said.

“As the climate crisis deepens they could be becoming less optimistic that individual technologies

may be able to solve the problem.’’

The survey,supported by groups including the World Bank,the United Nations Environment

Programme and the Pew Center for Global Climate Change,questioned l,000 senior figures across

governments,pressure groups and companies in 1 15 countries over the last few weeks.

Almost three—quarters of the experts agreed in the survey that“equitable(公平的,平等的)e—

eonomic growth and development and significant progress in combating(与…斗争)climate change

Call be achieved at the salne time.’’

Asked to rate the likely Success of low—carbon technologies in the mid—term,they showed

less confidence than a similar survey 12 months ago.Support for offshore wind farms,was down

61%from 65%last year.Solar electricity generation was rated as having high—potential by 66%of  respondents,down from 74%.Support for hydrogen power was 32%,down form 36%in 2007.

The respondents also warned that a deep recession(衰退)would make a new global deal on climate harder to achieve.Some 44%agreed that the current economic crisis will significantly delay orcompromise the“achievement of effective climate change agreements.’’

72.Which of the following is NOT the alternative energy?    ·

A.Wind energy.    B.Solar power.    C.Hydrogen energy.D.Conventional energy.

73.Which of the following altemative energy sees the most remarkable reduction in support'?

A.Offshore wind farms.    B.Solar electricity.

C.Hydrogen power.       D.Natural gas.

Why is support for renewable energy technology to fight dobal warming weakening?

A.The technology has no use at  all.

B.People don’t want to use the technology.

C.Nothing can be done to reduce carbon levels in the atmosphere.

D.The current economic crisis iS to blame.

75.What’S the best title of the passage?

A.Experts Lost Faith in Renewable Technology  B.Global Environment Is Worsening

C.Who Is to Blame f.0r tIle Environment  D.What Can Be Done to Save the Earth

题型:单项选择题

下面是某求助者的MMPI测验结果 

关于MMPI,正确的说法包括()。

A.如果只为了临床诊断,就做前339题 

B.399题原版本Q原始分超过24,答卷无效 

C.根据因素分析法编制而成 

D.施测形式包括手册式和卡片式

题型:单项选择题

以太网MAC地址的长度为______位。

题型:单项选择题

财务分析是指利用有关信息和特定手段,对企业的财务活动施加影响或调节,以便实现计划所规定的财务目标的过程。

题型:单项选择题

用户的()就是用户注册进入系统时的初始基本目录。

A.当前目录

B.工作目录

C.相对路径名

D.主目录

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