未分类题
白色海绵状斑痣的好发部位不包括( )
A.口腔黏膜
B.鼻腔
C.肛门
D.外阴
E.手背
【参考答案】
E
白色海绵状斑痣是少见的常染色体显性遗传病,除了口腔黏膜外,还可发生于鼻腔、肛门、外阴。因此正确应选E。手背并......
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单个牙出现窄而深的骨下袋并常伴有牙齿明显松动,应考虑( )A.咬合创伤 B.慢性牙周炎 C.侵袭性牙周炎 D.慢性龈炎 E.牙龈增生肥大
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单项选择题
听力原文: Itar-Tass news agency said a volcano in Russia's far eastern peninsula of Kamchatka erupted spectacularly on Thursday for the first time in nearly three decades. Shevelach Volcano, which had been dormant since 1964, spewed clouds of ash high into the air and reverberated with deafening explosion. Residents of Klyuch, 45 kilometers from the volcano, were in no danger but ash could fall on the settlement ff the wind changed. Kamchatka, with most 29 active and more than 200 extinct volcanoes, is one of the world's most active volcanic zones and forms part of a 'ring of fire' surrounding the Pacific Ocean.According to the news item the volcano had been dormant for about ______.A.45 yearsB.60 yearsC.30 yearsD.200 years
A.
According
B.
A.45
C.60
D.30
E.200
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