During their first winter, over half of the settlers died of or epidemics.
A. drought
B. starvation
C. fighting
D. cancer
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轻钢龙骨悬吊式天棚吊顶中,用于连接天棚楼板和吊筋的连接件是( )
The women of the settlement were responsible for at the harvest festival.
A. making up
B. dancing
C. cooking
D. playing instrument
胶粘剂一般多为有机合成材料,通常是由_______、_______、增塑剂、稀释剂及填充剂等原料经配制而成。
电影通过视觉自留原理产生。()
A. 对
B. 错