《2025年高中同步单元滚动强化卷高中英语选择性必修第三册北师大版》

C
Chinese scientists have created the world’s first light-based quantum(量子)computer named Jiuzhang. It is a milestone in which a quantum machine can solve a problem no classical supercomputer can tackle within a reasonable time.
Experts recognized the Chinese machine as a“state-of-the-art experiment”. Fabio Sciarrino, a quantum physicist at Sapienza University of Rome, told Science News that his first impression of the Chinese quantum computer was, simply, “wow”. Anton Zeilinger, noted quantum physicist and president of the Austrian Academy of Sciences, said that, following this experiment, he predicts there is a very good chance that quantum computers may be used very broadly someday.
Quantum computers stand out at running simulations that are impossible for conventional computers. Quantum machines can take computational shortcuts when simulating extremely complex situations, while conventional computers have to force their way to a solution, taking significantly more time in the process.
Moreover, they can perform an extreme calculation, called Gaussian boson sampling, in 200 seconds. The same task would take one of the world’s fastest classical supercomputers, Fugaku, around 600 million years.
Pan Jianwei, who is recognized as China’s top quantum scientist and one of the key researchers behind Jiuzhang, said the calculations they carried out can not only showcase the machine’s computing power but also demonstrate potential practical applications in machine learning and quantum chemistry.
“Quantum computing has already become a fierce competition area among the United States, Europe and other developed regions,”Pan said, adding that China’s quantum computational advantage took about 7 to 10 years to achieve, since the team first decided to tackle the problem around 2013.
However, Pan stressed that the quantum computer is a highly specialised machine, and is currently only programmed to do boson sampling.
“It is not a general-purpose quantum computer,”he said. In the near future, scientists may increase Jiuzhang’s possible output — a key indicator of computing power — from 10th to the 30th power to 10th to the 40th power.
28. What is Anton Zeilinger’s attitude towards quantum computer?
A. Negative. B. Optimistic.
C. Doubtful. D. Satisfied.
29. How does the author support his opinion in Paragraph 3?
A. By making contrasts.
B. By presenting reasons.
C. By analysing figures.
D. By conducting experiments.
30. What may be the next main focus in developing Jiuzhang?
A. Capacity. B. Programme.
C. Storage. D. Application.
31. What does the text mainly talk about?
A. High recognition of Chinese experts in the world.
B. Fierce competition in boson sampling all over the world.
C. Appearance of the world’s first light-based quantum computer.
D. Distinctions between quantum computers and conventional computers.

答案： 28.B 29.A 30.A 31.C