- 分子动理论:内能
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如图所示,由导热材料制成的气缸和活塞将一定质量的理想气体封闭在气缸内,活塞与气缸壁之间无摩擦,活塞上方存有少量液体.将一细管插入液体,由于虹吸现象,活塞上方液体逐渐流出.在此过程中,大气压强与外界的温度保持不变.关于这一过程.下列说法正确的是( )
正确答案
Asia’s real boat-rocker is a growing China, not Japan, a senior American economist observed.
There is so much noise surrounding and emanating from the world’s miracle economy that it is becoming cacophonous. In Washington, D. C., the latest idea is that China is becoming too successful, perhaps even dangerously so: while Capitol Hill resounds with complaints of trade surpluses and currency manipulation, the Pentagon and sundry think-tanks echo to a new drumbeat of analysts worrying about China’s 12.6% annual rise in military spending and about whether it might soon have the ability to take preemptive military action to force Taiwan to rejoin it. So it may be no coincidence that for
three consecutive weekends the streets of big Chinese cities have been filled with the sounds of demonstrators marching and rocks being thrown, all seeking to send a different message: that Japan is the problem in Asia, not China, because of its wanton failure to face up to its history; and that by cosying up to Japan in security matters, America is allying with Asia’s pariah.
Deafness is not the only risk from all this noise. The pressure towards protectionism in Washington is strong, and could put in further danger not only trade with China but also the wider climate for trade liberalisation in the Doha round of the World Trade Organisation (WTO). So far words have been the main weapons used between China and Japan, but there is a chance that nationalism in either or both countries could lead the governments to strike confrontational poses over their territorial disputes in the seas that divide them, even involving their navies. And the more that nationalist positions become entrenched in both countries but especially China, the more that street protests could become stirred up, perhaps towards more violence.
All these issues are complex ones and, as is often the case in trade and in historical disputes, finding solutions is likely to be far from simple. A revaluation of the yuan, as demanded in Congress, would not rebalance trade between America and China, though it might help a little, in due course. A "sincere" apology by Japan for its wartime atrocities might also help a little, but it would not suddenly turn Asia’s natural great-power rivals into bosom buddies. For behind all the noise lies one big fact: that it is the rise of China, not the status or conduct of Japan, that poses Asia’s thorniest questions.The "the world's miracle economy" in the beginning of the second paragraph refers to()
A.Asia's real boat-rocker.
B.China's economic success.
C.Japan's economic success.
D.both China and Japan's economic success.
正确答案
B
解析
推理题。文章一开始就谈到,亚洲真正掌舵的是中国,而不是日本;第二段第二句也提到“…中国正变得太成功”,由此可推知第二段开头的“世界的奇迹经济”指的就是中国的经济成功,所以[B]项正确。[A]“亚洲真正的掌舵者”,[C]“日本的经济成功”和[D]“中国和日本的经济成功”都不是文章所要表达的内容。
在用注射器验证玻意耳定律的实验中,利用p-1/V图线来验证,若根据实验数据画出的图线不是直线,而出现了如图所示的情景,则可能的原因是( )
正确答案
患者,男,38岁。肺部感染,遵医嘱行青霉素皮试,出现过敏反应,突然出现呼吸困难,意识丧失。护士应立即采取的措施是
正确答案
解析
此题属于临床实践类考题,比较简单。青霉素过敏性休克患者,应立即停药,协助患者平卧,然后立即皮下注射0.1%盐酸肾上腺素。故选E。
如图所示,电路与一绝热密闭气缸相连,Ra为电阻丝,电源有内阻,气缸内有一定质量的理想气体,电键S闭合,现将变阻器的滑动片向下移动的过程中,下列说法正确的是( )
正确答案
如图所示,由导热材料制成的气缸和活塞将一定质量的理想气体封闭在气缸内,活塞与气缸壁之间无摩擦,活塞上方存有少量液体.将一细管插入液体,由于虹吸现象,活塞上方液体逐渐流出.在此过程中,大气压强与外界的温度保持不变.关于这一过程.下列说法正确的是( )
正确答案
如图所示,绝热气缸固定在水平地面上,气缸内用绝热活塞封闭着一定质量的理想气体.开始时活塞静止在图示位置,现用力F使活塞缓慢向右移动一段距离,则在此过程中( )
正确答案
如图所示,绝热的容器内密闭一定质量的气体(不考虑分子间的作用力),用电阻丝缓慢对其加热时,绝热活塞无摩擦地上升,下列说法正确的是( )
正确答案
如图所示,质量为m的活塞将一定质量的气体封闭在气缸内,活塞与气缸之间无摩擦.a态是气缸放在冰水混合物中气体达到的平衡状态,b态是气缸从容器中移出后,在室温(27°C)中达到的平衡状态.气体从a态变化到b态的过程中大气压强保持不变.若忽略气体分子之间的势能,下列说法正确的是( )
正确答案
导热性能良好的气缸和活塞,密封一定质量的理想气体,气缸固定不动,保持环境温度不变.现在将活塞向右缓慢拉动一段距离,稳定后( )
正确答案
患者,男性,79岁。因患ARDS入ICU,病情缓解后,患者对护士说:“见不到孩子、老伴,心里不舒服。”说明患者存在
正确答案
解析
此题属于临床基础类考题,比较简单。根据马斯洛人类需要层次论,该患者存在爱与归属的需要。故选C。
如图所示,一根竖直的弹簧支持着一倒立气缸的活塞,使气缸悬空而静止,气缸和活塞的总质量为M,气缸内封闭一定质量的理想气体.设活塞和缸壁间无摩擦且可以在缸内自由移动,缸壁导热性能良好,不漏气,外界大气的压强和温度不变.现在气缸顶上缓慢放上一个质量为m的物体.当系统平衡时,下列说法正确的是( )
正确答案
如图所示,绝热气缸用质量为m的绝热活塞密闭一定质量的气体,活塞可在气缸内无摩擦地滑动.现在给气缸内的电热丝通电缓慢加热气体,使活塞缓慢上升.假设大气压强不变,忽略气体分子之间的分子力,则在对气体缓慢加热的过程中( )
正确答案
(B)如图示,导热气缸开口向下,内有理想气体,气缸固定不动,缸内活塞可自由滑动且不漏气.活塞下挂一砂桶,砂桶装满砂子时,活塞恰好静止.现给砂桶底部钻一个小洞,细砂慢慢漏出,外部环境温度恒定,则( )
正确答案
如图所示,绝热气缸封住一定质量的理想气体,竖直倒放于水平地面,活塞质量不可忽略,不计摩擦.现把气缸稍微倾斜一点重新达到平衡,则( )
正确答案
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