【单选题】题: 按GB/T272-93规定,既承受径向力,又承受单向轴向力时,通常应成对使用的滚动轴承的类型代号是()
【单选题】常用于O/W型乳剂型基质的乳化剂的是( )
【单选题】The PLA man saved the boy ____ death.
【简答题】在字符匹配查询中,通配符“%”代表_ ___,“_”代表任意单个字符。
【单选题】阴离子型表面活性剂的肥皂类说法错误的是?
C.
因M不同,又分为碱金属皂、碱土金属皂、有机胺皂(如三乙醇胺皂)等
【单选题】What did the small boy think when he saw tears in his teacher's eyes?
B.
She didn't like school.
C.
There was something wrong with her eyes.
【简答题】在字符匹配查询中,通配符“%”代表_______。
【多选题】金融创新带来了新的风险,除增加了金融机构的经营风险和投机风险外,还带来了以下新的风险,即()。
【单选题】She saw ____ boy playing with his dog