皮皮学，免费搜题
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搜题
【单选题】
声波振动由鼓膜经听骨链传向卵圆窗时：A.
幅度减小，压强增大
B.
幅度增大，压强增大
C.
幅度减小，压强减小
D.
幅度增大，压强减小
E.
幅度与压强不变
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】课后练习题:第3.2题,第3.3题和第3.6题。
【简答题】Lanny had sent his mother a telegram upon his (arrive) ______ in Brest.
【单选题】What is the man' s problem?
A.
He has missed his flight．
B.
His flight will arrive late．
C.
He has to take another flight．
D.
His flight has been cancelled．
【简答题】His (arrive) made the situation worse.
【简答题】On his (arrive) at the railway station, he was told that his train was delayed for two hours.
【简答题】金属有机物气相外延生长是否能用作硅的外延生长?为什么?