第2题: [单项选择]What does the second paragraph mainly discuss A. Some animals and plants depend on each other for existence. B. Some animals and plants develop their relationship easily. C. Some plants depend on each other for food. D. Some animals live batter together. 参考答案:A 答案解析:[解析] 主旨大意愿。从文章第二段最后两句.In their skins…needs to breathe.If the plants are killed...the corals will die
A. seek pleasure B. recover from the physical and mental fatigue of work C. make preparations for the work of the next period of time D. free ourselves from the pressure of the work 参考答案:C 答案解析:[解析] C在短文中未提及。A、B、D三项与短文原意相符。
第26题: [单项选择]患者男性,32岁,既往健康,有烟酒嗜好。 1年前发现左上肢“红线”,伴肿硬,压痛。5个月前感觉右下肢凉、怕冷,麻木,行走200m出现小腿疼痛。近1个月症状加重,出现夜间疼痛。查体:右下肢发绀,皮温凉,右股动脉弹性好,足背胫后动脉搏动未触及。 目前临床分期为 A. 第一期 B. 第二期 C. 第三期 D. 第四期 E. 第五期 参考答案:A 答案解析:第一期(局部缺血期)患肢麻木、发凉、轻度间歇性跛行,可反复出现游走性浅静脉炎。检查发现患肢皮温稍低,色泽较苍白,足背或胫后动脉搏动减弱。第二期 (营养障碍期)症状加重,间歇性跛行明显,疼痛转为持续性静