Question

閱讀短文，為每段話選擇中心意思

詞匯預約：alien(性質不同的，陌生的)　outmoded(過時的，老式的)　habitat(生境，棲息地)　shunned(避開，回避)　bacteria(細菌)vertebrate(脊椎動物，有椎骨的)

選擇閱覽：

A．After habitat destruction, the biggest threat to biodiversity is invasion by alien species．

B．More species will mean fewer medicine．

C．At high latitudes, entire forest type are expected to disappear, to be replaced by new ones．

D．Even if we stop killing species today, nobody reading this will see wildlife restored to its former glory．

E．Biodiversity is good for humans．

F．The romantic notion of “wilderness” is fast becoming outmoded．

正文閱讀

1．________

Scientists found that human activity has displaced the natural habitat over two-thirds of the habitable surface of the planet．Much of the undisturbed land is merely rock, ice and blowing sand, already shunned by wildlife．

2．________

These have arrived mainly through trade, tourism and biocontrol, invasive plant species already cover 400 000 square kilometers of the US, and are spreading at 12 000 square kilometers a year．At that rate, the whole of the US will fall to outside species within 750 years．

3．________

By destroying it, we could bring the axe down on our own heads．Rural communities in more than 60 countries get much of their neat from wild animals．Overpopulation, famine and the spread of high-powered weapons are killing off these creatures．

4．________

Three-quarters of the top 150 prescription drugs in the US are lab versions of chemicals found plants, fungi, bacteria and vertebrates．The WHO estimates that more than 60 per cent of the world population relation relies on plants for primary healthcare．There are 3000 plant species used in birth contra lone．

5．________

The dent already made in biodiversity will take 10 million years to repair itself．

Answer 1

答案：
解析：

1．F　本段說原有的生態環境被改變，還保持原狀的地方只剩下巖石、冰川等地。所以應該選F項，“曠野”一詞原來的含義正在成為過去。 　　2．A　根據最后一句和第一句可知說的是外來物種的入侵。 　　3．E　本段說物種多樣性有益于人類。 　　4．B　本段說物種的減少使藥材減少。 　　5．D　本段說物種的損害已經造成，要想恢復很難。