某起重机变幅时其起吊物重心未发生变化,则此种变幅方式为( )性变幅。(平衡?非平衡?)
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某桥式起重机大车跨度为22m,其大车驱动机构应为()驱动。(集中?分别?)
汽车起重机在变幅过程中不允许挂吊载,此种变幅为()变幅。(调整性?工作性? )
【单选题】Howwouldyoulikeyoursteak,mediumorwell-done?
A. Rare.
B. Well-done.
C. Yes,please.
D. It’sverydelicious.
【单选题】Doyouneedsomedrinks?
Alemonade,please.
B. That’sright.
C. Somecaviar,please.
D. It’sOK.