采用液氯气化器充装液氯时，只许用水加热气化器，也可使用蒸汽直接加热。
更新时间:2024-11-24 05:57:46 1、正确错误
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Themanageriscallingona______customertryingtotalkhimintosigningthecontract．
Johnsaysthathispresentjobdoesnotprovidehimwithenough______forhisorganizingability.
I'm______tograduateinthenexthalfoftheyear.
已知离散型随机变量X的概率分布为
X10203040
P a
(1)求常数a;(2)求X的数学期望EX.
Thefloordoesnotlooksobadwhen________(sweep)clean.
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