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Hemophilia is due to in a coagulation factor and results in a bleeding disorder that often involves joints and muscles.
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The term infertility implies that the condition can be treated and reversed. The term isapplied to a permanent, irreversible inability to have children.
The woman is the obvious source of blame for the couple’s childlessness because she has undergone .
安全的结构，一定是可靠的，对吗（）
结构某功能的失效概率和可靠度之和为( )
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