【简答题】IUCN确定的濒危物种是指______具有高度的______可能性的物种。
【单选题】In what way could we have learned much more about our past than we do now?
A.
If our ancestors had kept a written record of every past event.
B.
If our ancestors had not burnt their written records in wars.
C.
If our ancestors had told exact stories of the most important happenings.
D.
If our ancestors had made more songs and dances.
【单选题】_____ this term, we will have learned more than 2,000 words. [ ]
【单选题】What is the IUCN aimed at?
A.
Saving natural resources.
B.
Cultivating rare plants.
C.
Hunting for animal experts.
D.
Protecting threatened species.
【单选题】听力原文:Jeff seemed to be no more surprised than I did when we learned that the business trip to Europe would be cancelled for an unknown reason. (25)
A.
Neither Jeff nor I was surprised.
B.
Both Jeff and I were surprised.
C.
Jeff was less surprised than I was.
D.
Jeff was more surprised than I was.
【单选题】The more learned a man is, ______ he usually is.
【简答题】为研究某因素与某疾病的关系,进行了队列研究(1997~1998),观察资料如下 由上述资料可得出该病发病率为( )