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【单选题】
下图是 “ 世界四条著名河流河口附近地区图 ”, 读图回答 24 ~ 25 题。 乙河河口没有形成三角洲,不能说明此现象成因的是A.
地势落差大，河水落差大，河口处泥沙不易沉积
B.
流经低平的盆地，利于河水流动中泥沙沉积
C.
流域内热带雨林广布，植被覆盖率高，水土流失较轻
D.
流域面积小，流量小，河流携带泥沙能力有限
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举一反三
【单选题】Hardly the helicopter _______ when the waiting crowd ran toward it.
A.
had...landed
B.
has...landed
C.
did...landed
D.
was... landing
【简答题】Hardly ________ the helicopter ________ when the waiting crowd ran toward it. A) had ..., landed B) has ..., landed C) did..., land D) was..., landing
【单选题】The FBI has been called in to help __________ the tragic helicopter crash that killed NBA champion Kobe Bryant, and his teenage daughter.
A.
neglect
B.
investigate
C.
insert
D.
emerge
【单选题】Hardly_____ the helicopter______ when the waiting crowd ran towards it.
A.
has…landed
B.
had…landed
C.
would…land
D.
was…landing
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