两个杯中分别装有浓度为40%与10%的食盐水,倒在一起后混合食盐水浓度为30%,若再加入300克20%的食盐水,则浓度变

两个杯中分别装有浓度为40%与10%的食盐水,倒在一起后混合食盐水浓度为30%,若再加入300克20%的食盐水,则浓度变成25%,那么原有浓度为40%的食盐水多

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1,2,5,13,68,(  )

1,2,5,13,68,(  )

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负责监督计算机及会计软件系统的运行,防止利用计算机进行舞弊的岗位是( )。

负责监督计算机及会计软件系统的运行,防止利用计算机进行舞弊的岗位是( )。

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It was strange that she would __________ such an absurd idea

It was strange that she would __________ such an absurd idea.A.allow B.stick C.t

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The couple had no sooner got to the station __________ the c

The couple had no sooner got to the station __________ the coach left.A.when B.a

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