问题 多项选择题 案例分析题

某A施工公司承接一大型项目,因施工周期长,资金周转需求量大,拟以融资租赁方式向B设备租赁公司取得三台中联重科生产的TC5613塔式起重机用于施工,A、B公司双方合同约定:租赁期满,三台机归A公司所有;租赁期内由A公司承担租赁设备的全部管理。

请根据背景资料完成相应小题选项,其中判断题二选一(A、B选项),单选题四选一(A、B、C、D选项),多选题四选二或三(A、B、C、D选项)。多选、不选、错选均不得分。

为了检查架设工作的正确性和保证安全运转,应对塔机的安全装置进行检查和调试。塔机安全装置主要包括()。

A.速度限制仪

B.行程限位器

C.载荷限制器

D.自重测量仪

答案

参考答案:B, C

阅读理解

Alia Sabur, from Northport, N. Y., US, went to college at age 10. And four years later, Sabur became a bachelor of science in. Applied Mathematics summa cum laude(以最优等成绩)from Stony Brook University -- the youngest female in US history to do so.  Her education continued at Drexel University, where she earned a Master of Science and a Doctor of Philosophy (哲学博士) in Materials Science and Engineering.

With an unlimited future ahead of her, Sabur directed her first career choice to teaching. "I really enjoy teaching," she said. She was three days short of her 19th birthday in February, 2008, when she was hired to become a professor at Konkuk University in Seoul, Korea.  This distinction made her the youngest college professor in history, according to the Guinness' Book of Worm Records, beating the previous record held by Colin Maclaurin, a student of Isaac Newton, in 1717.

Although she doesn't start until next month, Sabur has taken up teaching math and physics courses at Southern University in New Orleans. Sabur is old enough to teach in the city, but not to join her fellow professors in a bar after work. In Korea, where the drinking age is 20, she might have more luck.  In traditional Korean culture, children are considered to be 1 year old-when they are born, and add a year to their age every New Year instead of their actual birthday, so in Korea Sabur is considered 20.

On top of her unprecedented (空前的) academic achievements, Sabur has a black belt in Tae Kwon Do (跆拳道黑带). She is also a talented clarinet (竖笛) player who has performed with musicians like Lang Lang and Smash Mouth. So is there anything Sabur can't do?

小题1:We can learn from the passage that Sabur is ________.

A.America's youngest bachelor of science

B.Drexel University's youngest student

C.the world'syoungest college professor

D.the world's youngest female teacher小题2:When Sabur was hired as a professor, her actual age is ________.

A.fourteen

B.eighteen

C.nineteen

D.twenty小题3:What does the author mean by saying "she might have more luck" (in Paragraph 3)?

A.Sabur might be permitted to drink in a Korean bar.

B.Sabur would be allowed to attend parties in Korea.

C.Sabur is old enough to teach at Konkuk University.

D.Sabur is lucky to be hired by Konkuk University.小题4:According to the passage, which of the following is TRUE?

A.Alia Sabur is the youngest female doctor from Stony Brook University.

B.Colin Maclaurin has once been the youngest college professor in the world.

C.In Korea, Alia Sabur is not allowed to drink for she is still underage.

D.Alia Sabur knows anything but Tae Kwon Do.

问答题

氮的固定有三种途径:生物固氮、自然固氮和工业固氮。根据最新“人工固氮”的研究报道:在常温、常压、光照条件下,N2在催化剂(掺有少量Fe2O3的TiO2)表面与水发生反应,生成的主要产物为NH3。进一步研究NH3生成量与温度的关系,部分实验数据见下表(光照、N2压力1.0×105 Pa、反应时间1 h):

T/K303313323353
NH3生成量/(106 mol)4.85.96.02.0
相应的化学方程式:2N2(g)+6H2O(l) 4NH3(g)+3O2(g)ΔH=a kJ·mol1

回答下列问题:

(1)此合成反应的a________0;ΔS________0,(填“>”、“<”或“=”)

(2)已知:N2(g)+3H2(g) 2NH3(g) ΔH=-92 .4 kJ·mol1

2H2(g)+O2(g) ===2H2O(l)    ΔH =-571.6 kJ·mol1

则2N2(g)+6H2O(l)===4NH3(g)+3O2 (g) ΔH=________kJ·mol1

(3)从323 K到353 K,氨气的生成量减少的可能原因_________________;

(4)工业合成氨的反应为N2(g)+3H2(g)2NH3(g) ΔH=-92 .4 kJ·mol1,分别研究在T1、T2和T3(T1<T2<T3)三种温度下合成氨气的规律。下图是上述三种温度下不同的H2和N2的起始组成比(起始时N2的物质的量均为1 mol)与N2平衡转化率的关系。请回答:

①在上述三种温度中,曲线X对应的温度是________。

②a、b、c三点H2的转化率最小的是________点、转化率最大的是________点。

③在容积为1.0 L的密闭容器中充入0.30 mol N2(g)和0.80 mol H2(g),反应在一定条件下达到平衡时,NH3的物质的量分数(NH3的物质的量与反应体系中总的物质的量之比)为4/7。该条件下反应2NH3(g)  N2(g)+3H2(g)的平衡常数为________ 。