在工业电解槽上采用炭素阳极时,氧化铝的分解电压值是()
A、0.5—0.7V
B、1—1.5V
C、1.5—1.7V
D、2—2.5V
参考答案:C
Yang Liwei,China’s first spaceman,prepared carefully for going to space so that he could be sure of success at his first _________.
A.experiment
B.flight
C.attempt
D.try
逆断层