下列热化学方程式书写正确的是(的绝对值均正确)[ ] A.C2H5OH(l)+3

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问题:

下列热化学方程式书写正确的是(的绝对值均正确)[ ]

A.C2H5OH(l)+3O2(g)=2CO2(g)+3H2O(g);△H=-1367.0 kJ/mol(燃烧热)

B.NaOH(aq)+HCl(aq)=NaCl(aq)+H2O(l);△H=+57.3kJ/mol(中和热)

C.S(s)+O2(g)=SO2(g);△H=-269.8kJ/mol(反应热)

D.2NO2=O2+2NO;△H=+116.2kJ/mol(反应热)

考点:热化学方程式
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会计账簿是整个会计核算的中心环节,因此会计对外提供信息的主要方式就是会计账簿。 ( )

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如图所示,光滑水平面MN上放两相同小物块A、B,左端挡板处有一弹射装置P,右端N处与水平传送带理想连接,传送带水平部分长度L=8m,沿逆时针方向以恒定速度v=6m/s匀速转动.物块A、B(大小不计)与传送带间的动摩擦因数μ=0.2.物块A、B质量mA=mB=1kg.开始时A、B静止,A、B间有一压缩轻质弹簧处于锁定状态,贮有弹性势能Ep=16J.现解除弹簧锁定,弹开A、B,同时迅速撤走弹簧.求:

(1)物块B沿传送带向右滑动的最远距离;

(2)物块B滑回水平面MN的速度v'B

(3)若物体B返回水平面MN后与被弹射装置P弹回的A在水平面上相碰,且A、B碰后互换速度,则弹射装置P必须给A做多少功才能让AB碰后B能从Q端滑出.

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我们该怎样正确认识全面建成小康社会的进程?

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The modern university is the ideal environment for the creation and transfer of knowledge that drives national competitiveness in an increasingly global era. Its most effective form is the American adaptation of the European model, in which teaching, leaning and research are integrated into a single institution. Indeed, the American university has proved capable of almost anything, from developing advanced economic theories to creating new life forms.

Many national leaders understand that the university is the critical catalyst for America’s adaptability, economic robustness and emergence as a great power. And they are moving aggressively to catch up. The universities created by emerging economies beginning in the 1990s and through 2020 will likely play a decisive role in reshaping the global balance of economic power.

That is bad news for the United States. The past two decades of American university development have been characterized largely by self-satisfaction arising from steady progress by the top 20 or so research universities. And America as a nation has 1Seen coasting. Since 2000, the United States has lost its edge in the graduation of engineers and technologists. The country no longer dominates scientific discovery, innovation or exploration. Most important, the United States has not launched any effort to build new institutions to accommodate its increasingly diverse population of more than 300 million.

The result is that America’s university system, despite its historical pre-eminence, has ceased to grow. Furthermore, America’s university system has failed to adapt to the dramatic demographic shifts occurring as a result of social mobility and immigration.

America needs to realize that its universities face real competition from the rest of the world to attract the best and the brightest, to secure resources and to provide environments that educate and inspire. This is not to say that the best American universities are no longer the leaders in discovery and innovation. It is to say that the success of the higher-education system must be measured by more than just innovations. Its long-term performance depends on its ability to provide learning to a broad cross sections of citizens, to advance national proficiency in math and science and to create an adaptable work force, as well as to develop a national appreciation for discovery, entrepreneurship and the creative process.

In China and elsewhere, these are the goals of the new universities being built. In the United States, we need to move from a national self-confidence based on past success to one built on the knowledge that we are advancing a system of higher education that will meet our future needs. This will require that policymakers, business leaders and universities rededicate themselves to creating comprehensive learning and discovery environments; design entirely new models and methods for teaching, and then take action to implement them.

According to the author, US modern universities ()

A. is a perfect system which can deal with everything

B. is a system which is developing rapidly

C. is a trinity of teaching, learning and research

D. is a place for innovation and creation

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关于心理健康,下列哪种说法错误是()

A.个体心理在本身及环境条件许可范围内所能达到的最佳功能状态

B.心理健康是一种绝对的十全十美状态

C.心理健康是一种在各种行为反应中能积极而适度表现的健全的心理状态

D.心理健康就是合乎某一水准的社会行为

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