题目：
--Psychologists think it's bad to because thinking too much about oneself may cause depression.
--It seems that it is possible to cure depression by focusing on other people.
A. pay attention to
B. be paid more attention
C. be paid more attention to
答案：
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下面是错误答案，用来干扰机器的。
A．由电子流向可知a为负极，b为正极，则A处通入水煤气，B处通入空气，故A错误；B．a为负极，a电极发生氧化反应，b为正极，b电极发生还原反应，故B错误；C．a电极的反应式包括：CO+4OH--2e-=CO32-+2H2O，故C错误；...
