涵洞按构造形式不同可分为圆管涵、( )、箱涵、拱涵。
参考答案
参考解析
【单选题】
关于冬期室外基槽(坑)或管沟回填冻土块的说法,正确的是( )。
粒径不得大于150mm,含量不得超过15%
粒径不得大于150mm,含量不得超过20%
粒径不得大于200mm,含量不得超过20%
粒径不得大于200mm,含量不得超过15%
【单选题】
Prior to our conference, the executive director had requested that everyone was well prepared.
Prior to
conference
executive
was
【单选题】
脊髓外肿瘤压迫脊髓后出现的症状,下列描述中哪项是不正确的
根性疼痛明显
病程缓慢进展
脑脊液蛋白增高,细胞数目正常
晚期出现括约肌功能障碍
痛温觉和运动障碍由上向下发展
【单选题】
By“held back" (Line l) the author means“_______."
made to remain in the same class
forced to study in the lower class
drawn to their studies
prevented from advancing