题目内容

The term infertility implies that the condition can be treated and reversed. The term isapplied to a permanent, irreversible inability to have children.

A. sterility
B. specificity
C. sensitivity
D. conductivity

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The woman is the obvious source of blame for the couple’s childlessness because she has undergone .

A. hysterectomy
B. appendectomy
C. keratectomy
D. tonsillectomy

安全的结构，一定是可靠的，对吗（）

A. 对
B. 不对

结构某功能的失效概率和可靠度之和为( )

A. <1
B. =1
C. >1

C40的混凝土，其立方体抗压强度标准值是 ( )MPa

A. 26.8
B. 19.1
C. 40