The horizontal process is one of the （ ） landscape processes at the surface.

单选题

The horizontal range for large scale weather is about _________ .

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多选题

The horizontal process is one of the （ ） landscape processes at the surface.

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单选题

The advantage of chevrons over straight，horizontal bars is that the former ___.

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单选题

What does the author say about straight，horizontal bars painted across roads?

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多选题

【单选题】[选择题] Historically in North America, seismic design has emphasized the effects of horizontal ground motion because the horizontal components of an earthquake usually exceed the vertical components and because structures are usually much stiffer and stronger in response to vertical loads than they are in response to horizontal loads. (stiffer是什么意思?)

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