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【单选题】
以下关于气体管道安装说法错误的是( )。A.
对不锈钢管按需要的规格尺寸，用特制的专门管子割切断，要防止管子变形，再用专用工具去掉管子内外壁的毛刺
B.
氧气特别忌油，因此气体管道的内壁、阀门和附件在安装前，清洁或脱脂等
C.
管子脱脂工作应在室外进行
D.
气体管道安装，事先准备好的小洁净室内进行
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举一反三
【简答题】Limited company means that any shareholder who has paid for the shares which he has bought cannot be forced to pay more money into the company.
【单选题】A foreign firm has bought more than half of the shares in his company and ______.
A.
got over it
B.
overtaken it
C.
taken it over
D.
overcome it
【单选题】Zwick Company bought 28,000 shares of the voting common stock of Handy Corporation in January 2018. In December, Handy announced $200,000 net income for 2018 and declared and paid a cash dividend of $...
A.
$0.
B.
$56,000
C.
$28,000.
D.
None of these answer choices are correct.
【简答题】已知集合A={0，1，2，3，4}，集合B={-1，0，1，2，5}，则A∩B=______．
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