问题
选择题
121. Those who managed to _____ the prison will be punished.
A．run away
B．erase
C．escape
D．escape from
答案
答案：D
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121. Those who managed to _____ the prison will be punished.
A．run away
B．erase
C．escape
D．escape from
答案：D
和C0所含分子数均为
中含有的电子数为0.9
固体中含离子总数为4