掘进机主要由切割、装运、行走和液压系统等4部分组成。()
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锚杆安装的间距、排距允许许偏差正负100毫米。()
棚腿中心线与顶底板垂线之间的夹角叫迎山角,过山和退山都会降低支架的支撑能力。()
I’d rather stayed at home when it rains outside.
A B C D
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It ’s excited that so many people like that exciting TV program.
A B C D
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