常用钢筋混凝土的重度为下列( )值。

• A.15kN/m<img src="https://timg.fentiku.com/97/2016/12/22/lEqUfitN53.png" title='lEqUfitN53.png' alt='lEqUfitN53.png'/>
• B.20kN/m<img src="https://timg.fentiku.com/97/2016/12/22/hlvxoqFngK.png" title='hlvxoqFngK.png' alt='hlvxoqFngK.png'/>
• C.25kN/m<img src="https://timg.fentiku.com/97/2016/12/22/j9MOaGL3mt.png" title='j9MOaGL3mt.png' alt='j9MOaGL3mt.png'/>
• D.28kN/m<img src="https://timg.fentiku.com/97/2016/12/22/Pm1BCPg1wG.png" title='Pm1BCPg1wG.png' alt='Pm1BCPg1wG.png'/>

正确答案：C