作业帮提问一道GRE填空Some paleontologists debate whether the diversity o
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提问一道GRE填空
Some paleontologists debate whether the diversity of
species has _______ since the Cambrian period,or whether imperfections in the
fossil record only suggest greater diversity today,while in actuality there
has been either ________ or decreased diversity.BE/CD
Blank (i)
Blank (ii)
A change
D stasis
B declined
E escalation
C increased
F discontinuity
不明白为何whether...,or...不表示对比,即greater diversity与空格能形成对比吗?另外请翻一下此句,
Some paleontologists debate whether the diversity of
species has _______ since the Cambrian period,or whether imperfections in the
fossil record only suggest greater diversity today,while in actuality there
has been either ________ or decreased diversity.BE/CD
Blank (i)
Blank (ii)
A change
D stasis
B declined
E escalation
C increased
F discontinuity
不明白为何whether...,or...不表示对比,即greater diversity与空格能形成对比吗?另外请翻一下此句,
答案应该是CD,首先while 表示对比,和while之前的那句话在意思上形成对比所以,空格的词语应该和前面的意思不同,同时也与decrease 不同,再者,注意only,暗示greater 和之前空格的意思是一样的,都表示增长,since 表示自从,是时间状语,应该是这样吧.至于翻译...我只能说出大概的意思：就是说她们怀疑的是是自从cam时代之后开始增长还是仅仅是现在才增长,或者是根本就是相反面的东西