药物性龈炎（） A.牙槽骨吸收、牙周袋形成 B.牙龈红肿、龈袋形

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问题单项选择题 B型题

药物性龈炎（）

A.牙槽骨吸收、牙周袋形成

B.牙龈红肿、龈袋形成

C.剥脱性龈病损

D.牙龈组织弥漫性增生，表面呈颗粒结节状

E.龈缘及龈 * * 坏死

答案

参考答案：D

单项选择题

盆腔腹膜结核与上皮性卵巢癌的鉴别要点不包括（）

A.有无腹水

B.患病年龄

C.有无肿块

D.腹膜活检

E.CA125水平

单项选择题

When fighting a fire on a bulkhead using a portable carbon dioxide extinguisher，the stream should be directed at the（）.

A.base of the flames，moving the horn from side to side，following the flames upward as they diminish

B.top of the flaming area，moving the horn from side to side，following the flames downward as they diminish

C.center of the flaming area，moving the horn vertically from top to bottom

D.bottom of the flaming area，moving the horn vertically to the top following the flames upward as they diminish