世界上唯一一个,还未完工就被列为世界遗产的建筑物是神圣家族教堂其创作者是谁?
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现场浇筑预制梁,平曲线桥的曲率如变化太大,则其()均需随曲率变化而变动。
A. 预制台座
B. 墩、台标高
C. 预制的梁段
Every vessel shall()maintain a proper look-out by sight and hearing as well as by all available means appropriate in prevailing circumstances and conditions so as to make a full appraisal of the situation and of the risk of collision.
A. in fog
B. at night
C. in narrow fairway
D. at all time
堆石坝钢筋混凝土面板宽块纵缝间距一般为()。
A. 6~7m
B. 8~11m
C. 12~16m
利用新一代天气雷达简单有效地判断是否有大冰雹时,应着重分析()。
A. 回波形状
B. 回波强度
C. 强回波(45-55dBZ或更强)区相对于0℃和-20℃等温线高度的位置
D. 回波面积