正确答案: C

甲——化学风化－流水侵蚀－石灰岩

题目：两地地貌形成主导外力作用与岩石组合正确的是（ ）。

解析：C

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举一反三的答案和解析：

[单选题]从原产地来看，党参适应( )气候。

冷凉

[单选题]柑橘类植物可由珠心、珠被等处的细胞发育成胚，这种现象称为( )。

无孢子生殖

[单选题]Mozart’s birthplace and the house ______ he composed “The Magic Flute” are both museums now.

where

[单选题]下列关于图示地区的叙述，正确的是A 河流众多，内河航运便利

暖流流经，渔业资源丰富

[多选题]71Home can be a great place for children to study. It’s important to provide a workspace of their own where they can read books or just write a letter to their friends.

Attitude Is Everything.

Building a Good Home Learning Environment.

Hold a can-do attitude and your child will follow your example.

解析：71.D  72.F   73.G   74.A   75.E

[单选题]

date

[单选题]椴树科植物富含纤维，此纤维位于( )。

韧皮部