防冻排污阀的作用是什么？
参考答案：
排出贮罐底部液化气内水分，防止结冰冻环阀门。
SSL协议是安全套接字层协议
Many young people believe that war is stupid and unnecessary. To them, to lose one’s life on the battlefield is ______ .
A．glorious B．futile C．heroic D．courageous
