皮皮学，免费搜题
登录
搜题
【单选题】
is the means by which a message is transmitted from its origin to its destination.A.
A feedback
B.
A source
C.
A receiver
D.
A channel
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
【简答题】阅读理解 There are literally hundreds of national parks and wildlife areas in Africa that you can travel to. Here are the top four travel destinations in Africa: Tanzania-Serengeti NP During the annual mi...
【单选题】If you are satisfied with the service, you can give the waiter a _______.
A.
tip
B.
thank you
C.
praise
D.
hand
相关题目：