题目内容

轻型门式刚架结构斜梁腹板应在设置横向加劲肋?

A. 与中柱连接处
B. 较大固定集中荷载作用处
C. 翼缘转折处

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当工字形截面梁、柱构件的腹板受弯及受压板幅利用屈曲后强度时,应按有效宽度计算其截面几何特征。

A. 对
B. 错

轻型门式刚架结构,实腹式斜梁在刚架平面内可按压弯构件计算强度,在平面外应按压弯构件计算整体稳定。

A. 对
B. 错

write down the correct answer in each sentence.The Cohen family’s home . . .1. is in the ( city / suburbs / mountains ).2. ( wastes / saves ) a lot of energy.3. has ( many / very few ) appliances and electronics.Amory Lovins’ home . . .4. is in the ( city / suburbs / mountains ).5. ( wastes / doesn’t waste ) a lot of energy.6. uses ( no electricity / only solar power ).Energy-saving tip7. To save energy at home, ( unplug / turn off ) appliances and electronics.

商业是以货币为媒介进行交换从而实现商品流通的经济活动。

A. 对
B. 错