如除买卖外，租赁、分割转让、分期付款、产权交换、拍卖、招标、协议成交、抵押等交易方式

已知二次函数f（x）=x²-（m+2）x+m+2（x∈R）同时满足：①不等式f（x）≤0的解集有且只有一个元素；②在定义域内存在x₁，x₂，使得x₁+x₂=0，但f（x₁）≠f（x₂）。设数列{a_n}的前n项和S_n=f（n）。

（1）求f（x）的表达式；

（2）求数列{a_n}的通项公式。

不经肾脏消除的肌松药是（）。

A.琥珀胆碱

B.加拉碘铵

C.氯酰胆碱

D.维库溴铵

E.阿曲库铵

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

事故时，为何要采用跳FMK灭磁，而不能采用逆变方式？

北朝民歌《木兰诗》是一首（）。

A.五言绝句

B.散文

C.抒情诗

D.叙事诗