四级听力真题及原文（校对版）_大学英语听力

四级听力真题及原文（校对版）

　　Questions 32- 35 are based on the passage you have just heard。

　　32 What does the talk focus on?

　　33 What did the X-ray technician ask her company to do?

　　34 What does the speaker say about the two pregnant women working with paint?

　　35 Why did the workers in the firm wear ski-clothing to work?

　　Contrary to the old warning that time waits for no one. Time slows down when you are on the move. It also slows down more as you move faster, which means astronauts someday may survive so long in space that they would return to an earth of the distant future. If you could move at the speed of light, your time will stand still. If you could move faster than light, your time will move backward.

　　Although no form of matter yet discovered move as fast as or faster than light, scientific experiments have already confirmed that the accelerated motion causes a travelers time to be stretched. Albert Einstein predicted this in 1905, when he introduced the concept of relative time as part of his special theory of relativity. A search is now underway to confirm the suspected existence of particles of matter that move at the speed greater than light, and therefore might serve as a passport to the past.

　　An obsession with time, saving, gaining, wasting, losing and mastering it, seems to have been part of humanity for as long as humans have existed.Humanity also has been obsessed with trying to capture the meaning of time. Einstein used a definition of time for experimental purposes, is that which is measured by a clock, thus time and times relativity are measurable by any hour glass, alarm clock or an atomic clock that can measure a billionth of a second.