单选题 Today the functions of theory and observation are divided into two distinct communities in physics. Both experiments and theories are much more complex than back in Newton's time. Theorists are exploring areas of Nature in mathematics that technology so far does not allow us to observe in experiments. Many of the theoretical physicists who are alive today may not live to see how the real Nature compares with the mathematical description in their work. Today's theorists have to learn to live with ambiguity and uncertainty in their mission to describe Nature using math.Questions:

单选题 According to the passage, today's experiments and theories in physics are______.

【正确答案】 A

【答案解析】解析：A：比以往更不确定。B：比以往更确定。C：和以往一样确定。D：不如以前更复杂。文中提到今天的试验和理论都比以往更复杂，而如今的理论学家要能够接受歧义与不确定因素。因此，此题选A。

单选题 From this passage you can infer that mathematics______.

A、 is powerful all the time
B、 may be helpless sometimes
C、 is a useful tool of description
D、 needs not be developed

【正确答案】 C

【答案解析】解析：文中提到现在的理论学家更通过数学研究来探索自然领域的某些问题，而这些问题目前还无法利用现有科学技术通过实验来演示给我们。由此可以推知，数学可以研究探索目前现有技术无法做到的方面，所以选C。

单选题 From this passage you can infer that technology.______.

【正确答案】 B

【答案解析】解析：根据原文，目前有些理论方面的探索是现有技术尚不能达到的水平，因此可以推断，技术在某些方面的作用是有限的。

单选题 "real Nature" could be best understood as______.

A、 the natural environment
B、 things as they used to be
C、 nature in contrast to culture
D、 things as they are

【正确答案】 D

【答案解析】解析：real Nature：事物的本质。A：自然环境，B：事物过去的样子，C：与文化相对的自然，D：事物的真实面貌。