设某种元件的使用寿命T的分布函数为
Johnsaysthathispresentjobdoesnotprovidehimwithenough______forhisorganizingability.
Theaddressbook________theemailaddressesofyourfriendsorgroupsofcolleagues.
Successfullearningisnota(n)________activitybutconsistsoffourdistinctstagesinaspecificorder
Wooddoesnotconductelectricity;________.
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