【单选题】Research completed in 1982 found that in the United States soil erosion ______.
A.
reduced the productivity of farmland by 20 percent
B.
was almost as severe as in India and China
C.
was causing significant damage to 20 percent of farmland
D.
could be reduced by converting cultivated land to meadow or forest
【单选题】男性,56岁,有吸烟史,咳嗽1年,左胸痛半年,反复痰中带血,近2个月声音嘶哑,胸片示左第2前肋间2cm×3cm致密阴影,呈分叶状.边缘有短毛刺,侧位在左上叶前段,左肺门阴影增大,最可能的诊断是
【单选题】某男,56岁,耐火材料厂工作30年,3年起胸闷、气短、轻咳、消瘦,半年前开始持续性胸痛,胸透发现右侧胸腔积液,胸水为黄色浆液性,后变为血性。其病可能的诊断是()
【简答题】患者,男,56岁,发作性胸痛半年,每当急走或骑自行车上坡时感觉左胸压榨样疼痛,停止活动后,休息几分钟可以缓解,冠状动脉造影显示冠状动脉有狭窄,结合所学知识进行分析:1.该患者的临床诊断是什么?2.主要存在哪些护理问题?3.患者胸痛发作时应该如何处理?
【单选题】患者,男,56岁,脑血栓半年。突发胸痛 4h,ECG示V3R~5R导联出现rS型,ST段弓形上抬,BP 88/60mmHg,HR 56/min,偶发室性期前收缩。给吸氧及肌内注射哌替啶后疼痛缓解,还需要立即首选的处理为
【单选题】Soil erosion turns field into .
【单选题】某男,56岁。胸脘痞闷,按之则痛,伴咳痰黄稠,舌苔黄腻,脉滑数,治疗当首选
【多选题】Soil erosion includes the three processes of
【简答题】土壤侵蚀类型 soil erosion type