皮皮学，免费搜题
登录
搜题
【单选题】
HTTP 协议默认使用的端口号是A.
TCP 端口 21
B.
TCP 端口 23
C.
TCP 端口 53
D.
TCP 端口 80
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】No matter how well you construct your speeches, they are likely to __________ unless you speak about matters of interest to your listeners.
A.
become offensive
B.
become illogical
C.
fall flat
D.
mislead
【单选题】No matter how well you construct your speeches, they are likely to __________ unless you speak about matters of interest to your listeners.
A.
fall flat
B.
become offensive
C.
mislead
D.
be illogical
【简答题】Unless you speak to him first, she ___(not speak) to you.
相关题目：