题目内容
（请给出正确答案）
A had decreased
B will decrease
C has been decreasing
D is decresing
如果结果不匹配，请 联系老师 获取答案
更多“Over the past decades, sea ice…”相关的问题
It can be concluded that ______.
A．raising the world's temperature only a few degrees would not do much harm to life on earth
B．lowering the world's temperature merely a few degrees would lead many major farming areas to disaster
C．almost no temperature variations have occurred over the past decade
D．the world's temperature will remain constant in the years to come
Over the past few years medical researchers______for a means of controlling the virus.
A．have searching
B．are searching
C．have been searching
D．search
A.regularities
B.regulation
C.irregularities
D.irregular
A.distributor
B.distribute
C.dismiss
D.distributable
In the past few days we have ____ the importance of further research in this field.
A. set aside
B. pulled into
C. talked over
D. carried out
There is evidence that man is changing, ______.
A．he has been growing taller over the past 500 years
B．he has got stronger eyes than he ever had
C．his hair is getting thinner and thinner
D．his limbs are getting weaker because he tends to make less use of them
A.A.has been continuing
B.B.might have continued
C.C.is continuing
D.D.have been continuing
