雅思閱讀練習(xí)題：生物壽命的差異

本篇是雅思閱讀練習(xí)題：生物壽命的差異，供大家學(xué)習(xí)參考。雅思閱讀備考階段，同學(xué)們需要通過(guò)適量的練習(xí)題來(lái)檢測(cè)自己的備考效果。希望以下內(nèi)容能夠?qū)Υ蠹业难潘紓淇加兴鶐椭?/p>

閱讀段落

Every organism has a life span which is highly characteristic. There are striking differences in life span between different species, but within one species the parameter is relatively constant. For example, the average duration of human life has hardly changed in thousands of years. Although more and more people attain an advanced age as a result of developments in medical care and better nutrition, the characteristic upper limit for most remains 80 years. A further argument against the simple wear and tear theory is the observation that the time within which organisms age lies between a few days (even a few hours for unicellular organisms) and several thousand years, as with mammoth trees.

段落大意

本段介紹了不同生物之間壽命的差異，以及同類生物壽命長(zhǎng)度的相對(duì)穩(wěn)定性。

閱讀筆記

Life span differs between different species within one species parameter is Relatively constant

E.g. human life

Argument against the simple theory—— observation

邏輯關(guān)系

1. 對(duì)比(邏輯連接詞: ALTHOUGH)

More and more people attain an advanced age as a result of developments in medical care and better nutrition.

The characteristic upper limit for most remains 80 years.