下列各项中,应该设立备查簿的是( )。A.租人固定资产 B.生产领用原材料 C.销

题型:单项选择题

问题:

下列各项中,应该设立备查簿的是( )。

A.租人固定资产

B.生产领用原材料

C.销售商品

D.提取现金

考点:价格鉴证师经济学与价格学基础理论会计核算方法
题型:单项选择题

提示疾病发展转折点的是()。

A.自汗

B.盗汗

C.绝汗

D.冷汗

E.战汗

题型:单项选择题

项目监理机构在施工阶段投资控制的主要任务不包括( )。

A.审查工程变更方案

B.进行工程计量

C.协助业主与承包单位签订承包合同

D.签署工程款支付证书

题型:单项选择题

(15分)火力发电厂释放出大量氮氧化物(NOx)、SO2和CO2等气体会造成环境问题。对燃煤废气进行脱硝、脱硫和脱碳等处理,可实现绿色环保、节能减排、废物利用等目的。

(1)脱硝。利用甲烷催化还原NOx

CH4(g) + 4NO2(g) =4NO(g) + CO2(g) + 2H2O(g) △H1=-574 kJ·mol-1

CH4(g) + 4NO(g) =2N2(g) + CO2(g) + 2H2O(g)  △H2=-1160 kJ·mol-1

甲烷直接将NO2还原为N2的热化学方程式为                                   

(2)脱碳。将CO2转化为甲醇:CO2(g)+3H2(g) CH3OH(g)+H2O(g)   △H3

       

①在一恒温恒容密闭容器中充入1 mol CO2和3 mol H2进行上述反应。测得CO2和CH3OH(g)浓度随时间变化如图1所示。回答:0~10 min内,氢气的平均反应速率为    mol/(L·min);第10 min后,保持温度不变,向该密闭容器中再充入1 mol CO2(g)和1 mol H2O(g),则平衡        (填“正向”、“逆向”或“不”)移动。

②取五份等体积的CO2和H2的混合气体(物质的量之比均为1∶3),分别加入温度不同、容积相同的恒容密闭容器中,发生上述反应,反应相同时间后,测得甲醇的体积分数φ(CH3OH)与反应温度T的关系曲线如图2所示,则上述CO2转化为甲醇的反应的△H3    0(填“>”、“<”或“=”)。

(3)脱硫。利用Na2SO3溶液可脱除烟气中的SO2。Na2SO3可由NaOH溶液吸收SO2制得。NaOH溶液吸收SO2的过程中,pH随n(SO32-)︰n(HSO3)变化关系如下表:

n(SO32)︰n(HSO3)91︰91︰19︰91
pH8.27.26.2
① 由上表判断,NaHSO3溶液显   性,用化学平衡原理解释:              

② 当溶液呈中性时,离子浓度关系正确的是(选填字母):    

a.c(Na+)=2c(SO32-)+c(HSO3-)

b.c(Na+) > c(HSO3-) > c(SO32-) > c(H+) = c(OH-)

c.c(Na+) + c(H+) = c(SO32-) + c(HSO3-) + c(OH-)

题型:单项选择题

齿面胶合主要发生在()齿轮传动中。

A.高速重载

B.高速轻载

C.低速轻载

D.低速重载

题型:单项选择题

I got a job teaching special education at a school in Coachella, California, a desert town about 170 miles from home. It was no (1) job. Street gangs (2) around the school after dark."Be careful," Dad warned me during one of my frequent weekend (3) home. He was concerned about my living (4) , but I needed to be on my own.One evening, I stayed after school to rearrange my classroom. (5) , I turned out the light and closed the door. Then I (6) toward the gate. It was (7) ! I looked around. Everyone had gone home.After (8) all the exits, I found just enough (9) to squeeze under a gate in the back of the school. Then I walked toward my car, parked in a field behind the building.Suddenly I heard voices. I (10) around and saw at least eight boys following me. (11) my pace, I reached into my shoulder bag to get my key. I (12) all over the inside of my handbag. But the key wasn’t (13) ! Dear Lord, please help me, I prayed (14) . Suddenly, my fingers touched a loose key in my purse. I didn’t even know if it was for my car, but I took it out and (15) it. It worked!I opened the door, slid in and locked it—just (16) the teenagers surrounded the car. Trembling , I started the engine and (17) away. When I returned to my apartment, the phone was ringing. It was my Dad. I didn’t tell him about my experience; I didn’t want to (18) him. "Oh, I forgot to tell you!" He said, "I had a(n) (19) car key made and slipped it into your purse—just (20) you ever need it.

 

第(13)空应选择()

A.there

B.lost

C.used

D.inside

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