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【单选题】
通过听骨链的杠杆作用，可使声压自锤骨柄传至前庭窗时增加的倍数是（）
A.
17倍
B.
2.5倍
C.
22.1倍
D.
1.3倍
E.
以上均不对
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】After the stock-market crash of October 1929 it took over three years for America’s government to launch a series of dramatic efforts to end the Depression, starting with Roosevelt’s declaration of a ...
A.
the gradual transformation of shadow banking system
B.
the prosperity of independent investment bank Wall Street relies on
C.
the bankruptcy of Bear Stearns and Merrill Lynch after being swallowed
D.
the conversion of Goldman Sachs and Morgan Stanley to commercial banks