A：Written, were
B：Written, there was
C：Writing, there was
D：Writing, were
说出下列句子的修辞手法
樟树的高贵之处就在这里。____
某发电厂原来用11kV的交流电压输电，后来改用升压变压器，将电压升高到220kW输电，输送的电功率都是P，若输电线路的电阻为R，则下列说法中正确的是( )
元素和根的符号
Fe
O
CO3
化合价
+3
﹣2
氧化铁____，碳酸钠____．
