HTTP服务器使用默认端口号（）监听来自HTTP客户的连接建立请求。
A.255
B.80
C.1
D.240
参考答案：B
-What’s your plan for the summer holidays?
-I’ve no idea, but I’ ve decided _____ at home and have a good rest first.
A．to stay
B．stay
C．stayed
D．staying
凡裸眼视力低于1.0（对数视力表5.0），称为视力低下，或称视力不良。
