问题 单项选择题

During our two months on the road, Bennett and I had a really (1) experience with a good, honest (2) and some helpful mechanics.

We were driving east on Highway 10 when our "chick engine" light came on. We limped of a(n) (3) into Las Cruces. We had a real car (4) Bennett nursed the ear into a local garage. By this time the car was missing so (5) it was shaking all over. This was the (6) time to arrive at a garage—late Friday afternoon. Service adviser Scott was busy (7) paper work and customers as we (8) our problems. (9) he was already "ten cars behind", he told us to pull the car into the garage.

Lincoln, who we later (10) was one of the two motor technicians, took (11) of our car repairing. He and Scott and some other mechanics stayed several hours after closing, (12) the car.

Early the next morning (the shop was officially closed on Saturdays), Lincoln finally located the (13) and fixed it easily within only (14)

Later Scott (15) out to us that it was our attitude that helped. "You didn’t come into the place demanding this or that. You showed an (16) of our problems on a busy Friday afternoon. Customer’s attitude means a lot. " He was right in some way, customers should show (17) and understanding to people who (18) them. (19) people were extremely busy, they found way to at least try and help when they are met with politeness.

The pleasant experience I had shows that (20) for other people can always help.

6().

A.highest 

B.easiest 

C.luckiest 

D.worst

答案

参考答案:D

填空题

碳捕捉和储存技术是指通过碳捕捉技术,将工业和有关能源产业所产生的二氧化碳分离出来再利用。在我国已经能够对捕捉到的二氧化碳进行净化,然后用于保鲜,或制造干冰,或将二氧化碳注入衰竭的油层以提高油田采收率或利用二氧化碳培养海藻和合成有机物等。

(1)下列捕获二氧化碳的反应中,其原子利用率不能达到100%的是_________。

a.CO2+CaOCaCO3

b.K2CO3+CO2+H2O=2KHCO3

c.2Mg+CO22MgO+C

(2)用二氧化碳合成烃,需要提供辅助原料氢气,下列制取氢气的方法中可行且能实现二氧化碳零排放的是_________

a.用太阳能光解海水制氢

b.利用天然气与水高温催化制氢

c.利用活泼金属与海水反应制氢

d.利用核反应堆多余的电能电解海水制氢

(3)CO与H2在一定条件下发生反应生成燃料甲醇:CO(g)+2H2(g)CH3OH(g)。某研究小组将2 mol

CO和4 mol H2置于一体积不变的1L密闭容器中,测定不同时间段内H2的转化率,得到如下数据:

根据以上信息作出的下列判断中正确的是______。

a.反应在4.5 h时混合气体的密度和相对分子质量均比2h时的大

b.反应在5.5 h时,v正(H2)=2v逆(CH3OH)

c.在此条件下,反应的平衡常数约为1. 62

d.若其他条件不变,将CO的物质的量改为10 mol,则可得64 g甲醇

(4)某文献报道:在300℃、30 MPa条件下,以Fe、CoCl2作催化剂,CO2和H2反应生成丁烷和戊烷。

①假定在一实验容器中充入一定量的CO2和H2,加入催化剂,若CO2和H2转化率均为100%,产物只有丁烷和戊烷,n(H2)/n(CO2)=a,则a的取值范围为__________。

②据问题①,今有标准状况下的CO2 448 L,n(丁烷)/n(戊烷)=x,消耗H2的物质的量为y,则y=_____ (用x表示)。

填空题