what do you think of credit cards
what do you think of credit cards
In my opinion,they are dangerous.People are not c_____ with their money,and they spend more than they s_____.
In my opinion,they are dangerous.People are not c_____ with their money,and they spend more than they s_____.
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已知：a，b，c∈R+，求证：a+b+c≥ab+bc+ca．
1年前2个回答
你能帮帮他们吗