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问题 不定项选择题

下图是某空间站能量转化系统的局部示意图，其中燃料电池采用KOH为电解液，下列有关说法中不正确的是

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A．该能量转化系统中的水也是可以循环的

B．燃料电池系统产生的能量实际上来自于水

C．水电解系统中的阴极反应：4OH-―4e-＝2H2O＋O2↑

D．燃料电池放电时的负极反应：H2－2e-＋2OH-＝2H2O

答案

BC

填空题
从下面方框中选择适当的词填入短文中，使短文通顺正确（注意有些词要用适当的形式），方框中有两个多余的词。
forget,     little,     remember,    lot,    enjoy,   so,    good    
A rich man began to learn painting when he was sixty years old, and he 76 _______ it very much. He painted and painted. After twenty years, there were 77_______ of pictures in his workroom, and he thought they were very good.
One day, the old man was seriously ill in bed, but he didn’t 78_______ his pictures. He said to his grandson, Alan, “I want to give my pictures to a school, 79_______ the students will remember me. But which school do you think is the 80_______, my child?”
“Well,” said the little boy. “You’d better give them to a school for the blind!”
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判断题

在我国，国债买断是回购到期购回结算的交收时点为R+1日15:00。( )
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