还原糖在碱性溶液中,能将Cu2+还原成红棕色氧化亚铜沉淀,生成的氧化亚铜量与还原糖的含量成()。
The first true piece of sports
equipment that man invented was the ball. In ancient Egypt, as everywhere,
pitching (投掷) stones was a favorite children’s game. But a badly thrown rock
could hurt a child. Looking for something less dangerous to throw, the Egyptians
made what were probably the first balls. At first, balls were made of grass or leaves held together by vines (藤). Later they were made of pieces of animal skin sewed together and stuffed (塞满) with feathers or hay. A. animal skins stuffed with rocks B. twists of hay C. hides (兽皮) stuffed with hay or feathers D. grass and leaves tied with vines [单项选择]I've worked here since I ______ Harvard Business School.
A. leave B. left C. have left D. had left [多选题]下列关于细水雾灭火系统泵组不启动的处理原则的说法正确的是( )。
A.高压泵接触器未闭合:闭合接触器。 B.泵组停止触点闭合:断开泵组停止触点。 C.联动控制器未执行程序:检修联动控制器,必要时更换。 D.电源未接通:接通电源。 [单选题]
急性肾盂肾炎的基本病变属于( ) A.纤维蛋白性炎 B.卡他性炎 C.急性增生性炎 D.急性化脓性炎 E.肉芽肿性炎 [判断题]斩波器属于直流/直流变换。
A.正确 B.错误 [单项选择]有了地籍调查成果的支持,城市规划的合理性、科学性和可操作性会大幅度提高,规划的严肃性和______也将得到加强。
A. 可靠性 B. 可行性 C. 权威性 D. 强制性 [单选题]棚车和其他木(竹)质地板货车须安装防火板,( )型棚车除外。
A.PB B.P62 C.P64 D.P70 [单项选择]SPA协同凝集试验中的抗体类别是()
A. IgM B. IgG C. IgE D. IgA E. IgD [单选题] 在 SSM 中, 需要⽤到的 IGMP 是哪个版本
A. IGMPv 3 B. IGMPv 2 C. IG MPv 1 D. IG MPv 4 [单项选择]增加沉淀反应的浊度用()
A. 琼脂糖 B. 琼脂糖珠4B C. 聚乙二醇 D. 硫酸铵 E. 聚丙烯酰胺 [单选题]A公司为一家会员制健身会所。2×17年1月1日与客户签订为期2年的健身合同,约定自合同签订日起客户有权在该健身会所健身,除签订合同日客户需支付的2年年费3000元外,A公司额外收取100元会员费,作为为客户定制健身卡的工本费及注册登记等初始活动的补偿,无论客户是否在未来期间进行健身活动,A公司收取的年费及会员费均无需退还,假定不考虑其他因素,A公司2×17年应确认的收入金额为( )元。
A.3100 B.3000 C.1550 D.100 我来回答: 提交
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