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【简答题】
我国石油工业主要分布于 ,因而石油的基本流向是 。
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【单选题】Direct steamers to your port are few _______ the summer season.
A.
at
B.
for
C.
during
D.
with
【单选题】生物多样性是人类赖以生存和发展的基础．苍蝇能够垂直起落和急速转变方向，这是由于苍蝇的后翅变成了一对哑铃形的平衡棒．科学家根据平衡棒的导航原理，研制成了新型导航仪．这属于生物多样性的（ ）
A.
直接使用价值
B.
间接使用价值
C.
潜在使用价值
D.
生态使用价值
【单选题】Direct steamers to your port are _____________ during winter reason.
A.
few between
B.
far between
C.
far and few between
D.
few and far between
【单选题】Direct steamers to your port are few _______ the summer season.
A.
at
B.
for
C.
with
D.
during
【单选题】Direct steamers to your port are few ______________ winter season.
A.
at
B.
on
C.
during
D.
by
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