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【单选题】

声波经外耳道到达鼓膜,引起鼓膜震动,鼓膜凹面与锤骨柄的振幅比例为()

A.
1:1
B.
2:1
C.
3:1
D.
2.5:1
E.
3.5:1
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参考解析:
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举一反三

【单选题】成人的外耳道长()

A.
3.5~4.0cm
B.
2.5~3.5cm
C.
2.5~3.0cm
D.
2.0~2.5cm
E.
3.0~3.5cm

【单选题】男,23岁,右耳流脓十余年,右外耳道流脓,鼓膜穿孔,CT检查如图,最可能的诊断是()

A.
慢性中耳乳突炎
B.
中耳乳突结核
C.
中耳癌
D.
嗜酸性肉芽肿
E.
(海绵化期)耳硬化症

【单选题】外耳道内1/3病变更为常见的是:()

A.
外耳道湿疹
B.
外耳道疖
C.
外耳道炎
D.
恶性外耳道炎
E.
真菌性外耳道炎

【单选题】The Grand Canyon Standing on the rim of the Grand Canyon(大峡谷), gazing across this giant wound in the Earth’’s surface, a visitor might assume that the canyon had been caused by some ancient convulsion...

A.
it was caused by some ancient convulsion
B.
its presence is an embarrassment to the state of Colorado
C.
it looks like an injury on the Earth’s surface
D.
it has caused many visitors to injure themselves