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【单选题】
在同一张地形图上,等高线平距越大,说明( )。A.
等高距越大
B.
坡度越陡
C.
坡度越缓
D.
等高距越小
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反馈参考答案：
举一反三
【单选题】We ____ here two hours ago . We ____ here for two hours . [ ]
A.
have arrived, have been
B.
have come, have been
C.
came, have come
D.
arrived, have been
【简答题】请简述交换机的数据转发规则。
【简答题】昆虫内共生菌在哪些细菌类群中分布较多?
【单选题】We ______ for you everywhere. Where have you been?
A.
have looked
B.
looked
C.
have been looking
D.
are looking
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