我国黄龙自然保护区的石灰华地貌无论在单体规模还是在群体数量上都位居世界之首。 ( )
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The passage is mainly about()
A. how to build a work-at-home office
B. how to look for a work-at-home job
C. the equipment needed for home working
D. the skills required for working from home
VER命令是DOS的外部命令。
A. 对
B. 错