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【单选题】
对鼓膜传音功能的叙述，正确的是（）。A.
在振动频率为16～2000Hz范围内，鼓膜振动与声波振动同始同终
B.
咽鼓管阻塞时，可引起鼓膜内陷，但不影响听力
C.
鼓膜有较好的频率响应
D.
经鼓膜-鼓室空气-卵圆窗之间的联系，是声波传入内耳的最有效途径
E.
鼓膜有较大的失真度
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举一反三
【单选题】In which session did the General Assembly of the World Tourism Organization decide the date of World Tourism Day?
A.
In the first session.
B.
In the second session.
C.
In the third session.
D.
In the fifth session.
【简答题】In 1883, Coubertin first proposed the similar to the ancient Olympic s, it is not a succession, but the past only to the Greeks to participate in the sports will expand to the world. ...
【判断题】Xi jinping was elected general secretary of the CPC central committee at the first plenary session of the 18th CPC central committee in November 2012. In March 2013, Xi jinping was elected President a...
A.
正确
B.
错误
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