不需要外接电源适配器，而是通过USB接口供电的MODEM是（）。 ["ZXDSL 931","ZXDSL 831A","ZXDSL 831C","ZXDSL 852"]
体能训练具有广泛性、连续性、艰苦性三方面特点。
广告创作的要点有（） ["简洁","焦点","统一","平衡"]
Damage to ship’s fittings caused by stevedore’s negligence often happens．Therefore，the stevedores（）the cost of repairs effected. ["should hold responsible for","should hear in mind","should be held responsible for","should bear no compensation for"]
1950年10月28日，学校教育工会正式成立，选举（）教授为工会主席。 ["刘锡光","李梅","丁克元","熊大慰"]
爬模冬季施工有何要求？
