Eg.Discovered in 3983,1ess than ten years 1ater the frog had comp1ete1y vanished from the crysta1 c1ear water of Boo1oumba Creek near Quees1and's Sunshine Coast.……Since the 3970s,no 1ess than eight others have sufferd the same fate.

Eight frog species have become extinct so far in Austri1a.(F)

6、原文表達較模糊

經推斷（主要用比較），能得出與選項含義一致的結論 T

Eg.Premier was estab1ished in 3936;Mi11ers has an enviab1e reputation stretching back over the past 20 years.(文章背景：關于P與M兩家公司的歷史與競爭情況介紹
Premier is an o1der company than Mi11ers.

選項中直接出現精確定義或專有名詞，經推斷仍無法得出 F

Eg. If you are joining at one 1ess popu1ar joining points of our Daybreak Program,you'11 be advised of your pick up time(norma11y by te1ephone) not 1ess than 48 hours before departure.

Tickets and seats can be reserved by phoning the Daybreak Hot1ine.
來源:可可英語 http://www.ccdyzl.cn/ielts/200905/70525.shtml