第3题: [单项选择]A. If people had more time to learn how to do it. B. If its cost went down. C. If it could make buildings more attractive. D. If people realized its many advantages. 参考答案:D 答案解析:[听力原文] According to the speaker, how might thatching become popular again
第32题: [单项选择]男,19岁,患病一周,牙龈乳头坏死,前牙唇侧明显,坏死形成溃疡处凹陷,表面灰白色假膜,触之出血明显,口腔有腐败性口臭。体温37.8℃,颏下淋巴结肿痛,既往未出现全身明显异常现象。 有辅助诊断意义的检查是( ) A. 白细胞分类 B. 脱落细胞检查 C. 革兰染色涂片 D. X线片 E. 组织病理 参考答案:C 答案解析:[解析] 其病史及体征为典型的急性坏死性龈炎表现。急性坏死性龈炎的病因为螺旋体和梭形杆菌,具有辅助诊断意义的检查为革兰染色涂片。