6. Throughout most of history, the average human life span was probably only around thirty to forty years.
A:
B:
A:
B:
举一反三
- Then she might have 12 years of life left. The average amount of time spent then in being pregnant and looking after ______ under a year old was at least 15 years. By 1951 this had dropped to an average of only 4 years.
- “三十岁左右”如何用英语表示?( ) A: over thirty years<br/>old B: below thirty years<br/>old C: thirty years old<br/>or so D: between thirty and<br/>forty years old
- How old is the man A: He is twenty years old. B: He is thirty years old. C: He is forty years old.
- What can we infer from the text A: It is easy to prolong the average life span in developed country, because of the advanced health science. B: It is difficult to prolong the average life span greatly, because science cannot prevent the aging process now. C: If the diseases that cause most of the death can be cured, the average life span will increase greatly. D: More and more people will live past 100 if the diseases that cause most of the death can be cured.
- Which of the following statements is true of the Hawaiian natives A: Their life is worse than that of other Hawaiian minority groups. B: They are the only native group without sovereignty. C: Sixty percent of them are homeless or unemployed. D: Their life span is 5 years shorter than average Americans.