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