碳酸氢钠为()结晶形粉末,无臭,味咸,在潮湿空气或热空气中即缓缓分解,生成二氧化碳。
A、白色
B、浅绿色
C、浅蓝
D、黄色
参考答案:A
TCP (Transmission Control Protocol) was specifically designed to provide a reliable end-to-end byte stream over a(n)().
A.IP address
B.reliable network
C.socket
D.unreliable internet work
明钢管根据其再相邻两镇墩之间是否设置(),分为()和()两种敷设方式。