木柱、木梁清单项目的项目特征描述通常包括()。
A. 木材密度
B. 构件的规格尺寸
C. 木材种类
D. 刨光要求
E. 防护材料种类
下列()是木屋架的计量单位。
A. 榀
B. m3
C. m2
D. m
E. t
词汇与结构In flight, loss of control is the biggest single _________ of transport aircraft fatal accidents.
A. risk
B. consequence
C. result
D. cause
词汇与结构Loss of control in flight has been one of the most _________ causes of fatal aircraft accidents for many years.
A. considerable
B. significant
C. unchanged
D. tangible