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【单选题】
维持机体稳态的重要途径是A.
神经调节
B.
体液调节
C.
自身调节
D.
正反馈
E.
负反馈
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
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皮皮学刷刷变学霸
举一反三
【单选题】但建国后的导游服务发展的初创时期,周恩来总理对导游人员提出“三过硬”工作要求,是指( )过硬、外语水平过硬和业务知识过硬
A.
导游讲解
B.
政治素质
C.
服务能力
D.
宣传祖国
【简答题】听短文，选答案。听两遍。 1. There are _______ people in Tom's family. A. six B. seven C. eight 2. Tom's grandparents are in _______. A. England B. China C. America 3. Lucy is Tom's ________. A. mother B. aunt C. ...
【单选题】Tom's grandparents in this small town for nearly 40 years.
A.
live
B.
lived
C.
have lived
D.
are living
【简答题】阅读理解 Peter: Look, it's Tom's family photo. Jim: Is this Tom's sister? Peter: I don't know. Tom, is this your sister? Tom: Yes, it is. Her name is Linda. Jim: Tom, is this your mother? Tom: No, she is...
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