皮皮学，免费搜题
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【多选题】
下行参考信号的作用()A.
下行信道质量测量
B.
下行信道估计
C.
上行信道质量测量
D.
上行信道估计
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】He is a _____ boy who is always asking questions.
A.
curious
B.
interesting
C.
funny
D.
annoying
【单选题】He is always _____ about the outside world.
A.
critical
B.
curious
C.
current
D.
constant
【简答题】awaken address respect bestow register spontaneously curious enthusiasm. He is a ____________ boy who is always asking questions.
【简答题】awaken register respect enthusiasm address bestow curious spontaneously He is a _______ boy who is always asking questions.
【单选题】He is always curious about the _____ universe.
A.
ridiculous
B.
mysterious
C.
heartfelt
D.
exhausted
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