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【单选题】
鉴别慢性单纯性鼻炎和慢性肥厚性鼻炎正确的是A.
慢性单纯性鼻炎有持续性鼻塞，肥厚性为间歇性鼻塞
B.
慢性单纯性鼻炎伴有耳闭塞感等，肥厚性不明显
C.
慢性单纯性鼻炎的鼻腔粘膜结节状，肥厚性不明显
D.
慢性单纯性鼻炎的粘膜对麻黄碱反应敏感，肥厚性不敏感
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【简答题】Michael and Diana's innermost house is about 12 feet square. There is no ________, no hot water, and yet they lead a life of luxury here.
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【单选题】被连接件受横向外力作用时,如采用铰制孔用螺栓连接,则螺栓的失效形式可能为_______。
A.
螺纹处拉伸
B.
螺纹处拉，扭断裂
C.
螺栓杆剪切或挤压破坏
D.
螺纹根部弯曲断裂
【简答题】如题图所示电路，已知u S (t)=10cos100πt+2cos300πt(V)，u O (t)=2cos300πt(V)，C=9.4μF，求L 1 和L 2 的值。
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【简答题】如图所示电路含理想运算放大器．已知R 1 =1kΩ，R 2 =2kΩ，C 1 =1μF，C 2 =2μF，u s (t)=2ε(t)V，试求电压u 2 (t)。
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