问题 选择题

氢氧燃料电池是一种新能源。如图为氢氧燃料电池示意图。下列说法不正确的是(    )

A.a极是正极,b极是负极

B.该装置能将化学能转化为电能

C.电子由a极通过导线流向b极

D.供电时总反应为2H2+O2=2H2O

答案

答案:A

题目分析:原电池中较活泼的金属是负极,失去电子,发生氧化反应。电子经导线传递到正极,所以溶液中的阳离子向正极移动,正极得到电子,发生还原反应。所以在氢氧燃料电池中,氢气在负极通入,氧气在正极通入,则a是负极,b是正极,A不正确,其余选项都是正确的,答案选A。

点评:该题是高考中的常见题型,属于中等难度的试题,试题基础性强,注重考查学生灵活应变能力,有利于提高学生的逻辑推理能力。该题的关键是熟练掌握原电池的原理,特别是电极名称的判断、电极反应式的书写等。

阅读理解

Scientists have created a “ human-like robot” that can dance and do the housework.

“ Mahru” has been developed to imitate humans and can move its lips, eyebrows and pupils(瞳孔). The machine can also move its upper and lower body freely and automatically stop itself when walking.

In addition, it has been programmed to give out two kinds of pleasant smells to match its emotions.

The 1.5 tall robot was produced by researchers at the Korea Institute of Science and Technology (KIST) and is the first South Korean- developed machine of its kind.

“‘Mahru’ will open the way for the commercial use of humanoid robots doing housework,” You Bum-Jae, leader of the development research team ,said. “‘Mahru’ can dance while walking on its legs and is able to work in place of a human.”

Through an advanced motion capture (捕获) system, “Mahru” can follow a variety of human movements and move its hands freely enough to deal with any obstacles that may get in its way when walking.

State-funded KIST showed the robot during a presentation at its head office in Seoul.

People here were treated to an entertaining demonstration which saw the robot show off the full range of its skills, most notably s series of dance moves.

The research team added that they had designed another “ Mahru”, this time with sensors(传感器) allowing it to distinguish(分辨) between faces and objects.

The showing of “ Mahru” came a week after researcher in Japan said they had created the “most human-like” robot in the world. A team at robotics department of Osaka University in Japan claimed that “ robogirl”, Repliee R-1, “ looks, moves and interacts (相互作用) like a human, and has silicone(硅胶) skin that feels almost human to the touch.”

小题1: “Mahru” made by KIST can do the following things EXCEPT____________

A.dance with other human –like robots

B.move its body freely

C.stop automatically when walking

D.express certain feelings through smells小题2: According to what You Bum- Jae said in Paragraph 5, his research team wants to ________.

A.help robots with doing housework

B.show its scientific power

C.make Mahru offer more fun

D.explore Mahru’s commercial use小题3: When Mahru” meets something in its way, it will be likely to________.

A.go around it

B.turn back quickly

C.deal with it using its hands

D.ask humans for help小题4:According to the last paragraph, Repliee R-1 __________.

A.is another Mahru

B.was made by KIST

C.has skin feeling similar to humans’

D.looks like a boy小题5:The passage is probably a  __________.

A.news report

B.research report

C.healthy report

D.entertainment report

单项选择题