吊装或移运装配式桥梁构件时,吊绳与起吊构件的交角应大于( ),否则,应设置吊架或扁担。
A.30°
B.45°
C.60°
D.75°
参考答案:C
解析:目的是尽可能使吊环垂直受力。
Is a gold mine an example of a renewable or non-renewable resource and is the supply curve of gold perfectly elastic or inelastic in theory Type of resource Supply curve() ①A. Renewable Inelastic ②B. Renewable Elastic ③C. Non-renewable Elastic
A. ①
B. ②
C. ③
沟通与协调两者()。
A、相互联系
B、相互促进
C、相辅相成
D、以上都对