TCP/IP协议集中,保证数据传输可靠性和准确性的协议是______。
A.TCP B.IPC.UDP D.HTTP
参考答案:A
阅读下面的对话,从方框内7个选项中选择5个恰当的句子完成此对话,
A: 1 . Is there a supermarket in the neighborhood?
B: 2 .
A: Can you tell me the way to the supermarket?
B: Just go straight and turn right. 3 .
A: 4
B: 5 .
含挥发油的饮片烘烤时温度不应超过( )
A.60℃B.55℃C.50℃D.45℃E.40℃