题目内容：

Researchers with the University of Cambridge say they have the first real evidence of a new state of matter, some 40 years after it was first theorized.

Known as “quantum spin liquid(量子旋转水)”, the matter state causes normally unbreakable electrons to break into pieces called “Majorana fermions.” These fermions are an important discovery. Physicists believe the material is vital to further develop quantum computing. Computers employing Majorana femuons would be able to carry out calculations beyond the scale of modern computers quickly, they say.

Quantum spin liquid explains some of the eccentric behaviors inside magnetic(磁性的) materials. In these materials, the electrons should behave like small bar magnets, all adjusting towards magnetic north when a material is cooled. But not all magnetic materials do this—if the material contains quantum spin liquid, the electrons don’t all line up and become involved.

“Until recently, we didn’t even know what the experimental fingerprints of a quantum spin liquid would look like,” researcher Dr.Dmitry Kovrizhin says. “That created a challenge for the researchers, so they decided to employ neutron scattering(神经扫描) techniques to look for evidence of break”. What they found surprised them. The features matched nearly exactly with quantum spin liquid models theorized by physicist Phil Anderson in 1973. The results of their breakthrough were then published in the scientific journal Nature Materials on Monday.

Don’t get too excited just yet on its applications, though. Kovirzhin’s work is only the beginning and as we’ve seen with quantum computing there is a lot of work to be done. But it’s still exciting regardless.

“It’s an important step for our understanding of quantum matter,” Kovrizhin says. “It’s fun to have another new quantum state that we’ve never seen before—it presents us with new possibilities to try new things.”

1.What can we learn about “Majorana fermion” according to Paragraph 2?

A. It is an important discovery 40 years ago.

B. It is a surprising theory raised by Phil Anderson.

C. It is a key piece in developing quantum computer.

D. It is an unbreakable electrons employing computer.

2.Which of the following can best replace the underlined word “eccentric” in Paragraph 3?

A. Strange.    B. Complex.    C. Permanent.    D. Obvious.

3.How did the researchers make the breakthrough?

A. By adjusting magnetic materials.

B. By using neutron scattering techniques.

C. By repeating maths calculations.

D. By changing electronic structure.

4.What is the author’s tone about the future of quantum matter?

A. Negative.    B. Doubtful.    C. Indifferent.    D. Optimistic.