A. 占取空间小,容积大;制造简单;减轻物料流动阻力 B. 结构稳定,使用寿命长 C. 储煤量大,安全
A. Extremely cold air from shore passes over warmer water B. Warm dry air from shore passes over cooler water Cold ocean water evaporates into warm air D. Cool rain passes through a warm air ma
A. 正确 B. 错误
A. 黏膜皱襞破坏、消失 B. 黏膜皱襞平坦 D. 黏膜皱襞增宽、迂曲 F. 黏膜皱襞纠集 G. 黏膜皱襞纤细