取水样100mL，加酚酞指示剂，用0.1000mol/L的HCl标准溶液滴定，用去1

黄昏，当你面对太阳时，你的后面是（    ）方，左边是（    ）方，右边是（    ）方。

下列不属于计算机应用中人工智能的内容的是

A．辅助制造

B．专家系统

C．机器翻译

D．模式识别

下列叙述正确的是(  )

A．金属钠、镁等活泼金属着火时，可以使用泡沫灭火器来灭火

B．称取等质量的两份铝粉，分别加入过量的稀盐酸和过量的NaOH溶液，充分反应后，放出氢气的体积（同温同压下）相等

C．向NaHCO₃溶液中滴入Ba(OH)₂溶液无沉淀，而向Na₂CO₃溶液中滴入Ba（OH）₂溶液出现白色沉淀

D．某无色溶液中加Ba（NO₃）₂溶液，再加入稀盐酸，产生白色沉淀，则原溶液中一定含有SO

Famous centenarians (百岁老人) still active in arts, science are in no mood to retire. "Those who stand still, die," is one of Oliveira's favorite phrases. He knows from experience what it means, as the Portuguese film director has reached the age of 102 and is still active in his profession. Every year, Oliveira shoots a film and is currently working on his next project. "You have to work, work, work in order to forget that death is not far away," he said. When asked about his age, Oliveira said with some humility: "It's down to mother nature. It gave to me what it took from others."

Being both mentally and physically fit in old age is partly a matter of luck, but it also has something to do with character. Not every white-haired person is wise and social skills, openness and the ability to train the brain are essential for senior citizens.

Along with the architect Oscar Niemeyer (103), Nobel laureate Montalcini (101) and director Kurt Maetzig (100), Oliveira is one of those people of whom it would be very wrong to think as members of a listless elderly generation.

Another master in his profession is the architect Oscar Niemeyer. The 103-year-old Brazilian is best known for his futuristic-looking buildings in Brasilia, but he also speaks out on behalf of the poor. "The role of the architect is to struggle for a better world where we can develop a form of architecture that serves everyone and not just a privileged few," said Niemeyer recently. He spends almost every day working in his office in Copacabana, and even when he falls ill he keeps working on ideas: After a gallbladder (胆囊) operation he composed a samba tune (桑巴舞曲) in the clinic.

Another man who could sing a song about age is 107-year-old Heesters. The Dutch-born opera singer spent most of his life performing in Germany, where he still works. Recently Heesters said: "I want to be at least 108-years-old." He also plans to keep performing. "Should I just sit at home and wait until they come and pick me up?" Heesters has not given up trying to add to his tally of awards and is looking for a "good stage role".

Italian scientist Rita Levi-Montalcini, who is 101-year-old and is still active in medical science, has described the force that keeps driving her on: "Progress is created through imperfection." In 1986 she and her lab colleague were awarded the Nobel Prize for Medicine for their work on nerve growth factor. She's convinced that humans grow on challenges.

With so many brilliant examples given, we can see clearly that age is no barrier to some high achievers.

小题1:From the first two paragraphs, we can see ______.

A．being active at 102 is achievable for everybody

B．Oliveira owes his long life to his mother’s help

C．being fit in old age is a matter of luck and character

D．social skills and wisdom are difficult for the senior小题2:How many centenarians are mentioned in this passage?

A．4

B．5

C．6

D．7小题3:By saying "Should I just sit at home and wait until they come and pick me up?” in Paragraph 5, Heesters shows us he ________.

A．wants to sit or lie in comfort

B．is waiting for people to pick him up

C．is willing to work till he dies

D．prefers to give performance at home小题4:In the passage so many examples were given to show ________.

A．old age is a big problem if you want to succeed

B．as a senior citizen, you have to be open-minded and optimistic

C．old people should never think of themselves as old

D．old age cannot prevent a great person from achieving a lot小题5:In the writer’s opinion, the architect Oscar Niemeyer is not ________.

A．intelligent

B．pessimistic

C．positive

D．diligent

联合渔法的捕捞原理？