单选题 Questions 1--3 Choose the best answer.

单选题 Quantum physics ______.

A、 provided medical cures for persisting problems
B、 first appeared as a wonder drug in the 20th century
C、 described some phenomena no other previous theories had ever explored
D、 gave the best description of some behaviors of light and particles so far

【正确答案】 D

【答案解析】Paragraph 1: …and no other theory can match its description of how light and particles behave on small scales.

单选题 Quantum physics is a concept that ______.

A、 is very difficult to understand
B、 demands abundant statistics to master
C、 describes the objective nature of the real world
D、 has been rejected by many scientists

【正确答案】 A

【答案解析】Paragraph 2: But it can also be mind-bending.

单选题 Scientists are ______.

A、 frustrated by the philosophical problems related to quantum physics
B、 working to make use of quantum in developing technology
C、 trying to identify quantum's properties
D、 struggling to clarify how quantum physics and general relativity could form a new theory

【正确答案】 B

【答案解析】Paragraph 3: scientists are…trying to harness quantum's bizarre properties to advance technology, …