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【单选题】
设有表示公司和员工及雇佣的三张表 , 员工可在多家公司兼职: 公司 C( 公司号 , 公司名 , 地址 , 注册资本 , 法人代表 , 员工数 ) , 员工 S( 员工号 , 姓名 , 性别 , 年龄 , 学历 ) , 雇佣 E( 公司号 , 员工号 , 工资 , 工作起始时间 ) 。 其中表 C 的键为公司号 , 表 S 的键为员工号 , 则表 E 的键为A.
员工号 , 工资
B.
公司号 , 员工号
C.
公司号 , 员工号 , 工资
D.
员工号
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举一反三
【单选题】In the third paragraph, the phrase \"with the upper hand\" mea
A.
In the third paragraph, the phrase ///////"with the upper hand///////" means A．being low in spirit
B.
having only one hand
C.
being active
D.
being passive
【单选题】The secrets of sleep were a mystery for centuries simply because there was neither the means (51) them, nor the need. Only when candles gave way (52) gaslight, and gas to electricity, when man became ...
A.
investigate
B.
to investigate
C.
explore
D.
to explore
【简答题】______ into use in April 2000, the hotline was meant for residents reporting water and heating supply breakdowns. A. Put B. Putting C. Having put D. Being put
【简答题】Somewhere in our early education we become addicted to the notion that pain mea sickness. We fail to learn that pain is the bodys way of informing the mind that we are doing something wrong, not neces...
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