用双氧水制取氧气时,忘记加二氧化锰,其结果是请选择ABCD3m8p6o6d(H;T6Z)|+R7P:o(]2V(z;I5J2J-V0^
A. 不放出氧气2V(z;I5J2J-V0^
B. 放出氧气速率慢2V(z;I5J2J-V0^
C. 放出氧气总量会减少2V(z;I5J2J-V0^
D. 放出氧气总量增加2V(z;I5J2J-V0^