The average life expectancy of ancient Egyptians is about ______.A．32B．37C．50D．60

Among humans, the effects of aging vary from one individual to another. The average life _

Which of the following statements is NOT true？A．The U. S. life expectancy is at an all－tim

______to school life was less difficult than the pupil had expected.A．AdheringB．AdjustingC

______to school life was less difficult than the pupil had expected.（2013－66)A．AdheringB．A

What does the word " uptick" at the end of the 5th paragraph refer to？A．Longer life expect

The average life-span of Americans is 80 years.A.