普通钢筋强度标准值f、强度设计值f和疲劳应力幅限值，三者之间的关系为( )。

• A.f<img src="https://timg.fentiku.com/97/2016/12/22/wSPWQwl1tX.png" title='wSPWQwl1tX.png' alt='wSPWQwl1tX.png'/>>f<img src="https://timg.fentiku.com/97/2016/12/22/hcR1e4ranz.png" title='hcR1e4ranz.png' alt='hcR1e4ranz.png'/>><img src="https://timg.fentiku.com/97/2016/12/22/S7YjrcVdEZ.png" title='S7YjrcVdEZ.png' alt='S7YjrcVdEZ.png'/>
• B.f<img src="https://timg.fentiku.com/97/2016/12/22/lNU2b728DB.png" title='lNU2b728DB.png' alt='lNU2b728DB.png'/><f<img src="https://timg.fentiku.com/97/2016/12/22/NsYezhRa1D.png" title='NsYezhRa1D.png' alt='NsYezhRa1D.png'/><<img src="https://timg.fentiku.com/97/2016/12/22/dwdIknFxQ9.png" title='dwdIknFxQ9.png' alt='dwdIknFxQ9.png'/>
• C.f<img src="https://timg.fentiku.com/97/2016/12/22/aALgpCoZ0D.png" title='aALgpCoZ0D.png' alt='aALgpCoZ0D.png'/>>f<img src="https://timg.fentiku.com/97/2016/12/22/3cHEJQMPtV.png" title='3cHEJQMPtV.png' alt='3cHEJQMPtV.png'/>><img src="https://timg.fentiku.com/97/2016/12/22/cacdUzxSQN.png" title='cacdUzxSQN.png' alt='cacdUzxSQN.png'/>
• D.<img src="https://timg.fentiku.com/97/2016/12/22/0OqXuIK7Hc.png" title='0OqXuIK7Hc.png' alt='0OqXuIK7Hc.png'/>>f<img src="https://timg.fentiku.com/97/2016/12/22/Y1eOwlSNv2.png" title='Y1eOwlSNv2.png' alt='Y1eOwlSNv2.png'/>>f<img src="https://timg.fentiku.com/97/2016/12/22/aQGRDtpybJ.png" title='aQGRDtpybJ.png' alt='aQGRDtpybJ.png'/>

正确答案：A