吊顶轻钢龙骨,其中C型龙骨为承载龙骨,是骨架主要受力构件。
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铝合金吊顶龙骨一共分为两个部分,一是主龙(行业内称之为大T),二是副龙(行业内称之为小T)。
A. 对
B. 错
吸声用穿孔石膏板主要用于吸声性要求高的建筑,如影剧院、播音室、报告厅、会议室等对噪声限值较严的场所,作为吊顶、墙面的吸声装饰材料。
A. 对
B. 错
Which are the most expensive and the prettiest lanterns?
A. The lanterns which are modern.
B. The lanterns which are cunningly constructed.
C. The lanterns which can be carried in the hand.
D. The lanterns which are covered with gauze and thin white silk.
Which one is not mentioned in the course?
A. The Legend of the White Snake.
B. The Cowherd and the Weaving Maiden.
C. Journey to the West.
D. The Romance of Three Kingdoms.
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