Valvular heart diseases are quite
common, essentially resulting in impaired blood flow and were very difficult to
treat. Some 30 years ago, it became possible to replace .diseased valves with
prostheses to impose a greater control over blood flow. Early devices were of the mechanical variety, in which devices like ball-in-a-cage or tilting disc would be used to allow blood to flow under near-normal conditions. Although a few mechanical problems were encountered in the early days, the major difficulty lay with the tendency for any foreign material to initiate a blood clot. So, all valve recipients have to be given anticoagulant therapy. This is not particularly desirable for the patients, who may develop bleeding problems, and in any case is not always successful. Although good results are achieved with these valves, it was considered necess [单项选择]患者,男性,20岁。左侧胸部被匕首刺伤半小时。查体:胸痛,呼吸急促,口唇发绀。血压70/40 mmHg,脉搏120次/分。左侧胸壁有伤口,呼吸时能听到空气出入伤口的响声,气管移向健侧,患侧叩诊呈鼓音。
应考虑此患者为 A. 开放性气胸 B. 闭合性气胸 C. 损伤性气胸 D. 张力性气胸 E. 胸壁软组织刺伤 [名词解释]井塔基础类型
[单选题]丰田( )平台支持传统燃油车和混合动力系统,并且通过轻量化等设计进一步降低燃油消耗。
A. THS B. IMMD C. MQB D. TNGA [单选题]二氧化碳的排放量剧增导致全球气候变暖,使珠穆朗玛峰所在的喜马拉雅地区冰川正面临急剧缩小的危险。研究显示,珠峰海拔在5000米到6000米的冰川集中区域出现冰川快速融化的现象,这些地方将只在冬季而不是在温暖的季节时看到结冰。专家推论说,根据未来的气候变化趋势,喜马拉雅地区的冰川减少的速度还有可能加快,如果本世纪内气温如预测的一样继续升高,该地区的冰川最终将消失殆尽。
如果以下各项为真,最能削弱上述论证的是:
A.喜马拉雅山冰川面积每年缩小约0.1%到0.6% B.喜马拉雅山其他地方的冰川对气温变化不敏感 C.过去50年珠峰周边冰川覆盖面积减少了33.3% D.珠峰海拔7000米以上的冰川没有快速融化迹象 [判断题]根据我国《娱乐场所管理条例》的规定,娱乐场所的从业人员应当统一着工作服,佩献工作标志并携带身份证明。( )
A.正确 B.错误 [单项选择]人生发展阶段的“黄金时期”是指()岁。
A. 18~30 B. 18~35 C. 22~35 D. 25~35 [多选题]当场调解应该注意做到()
A.核实双方身份,查清事实,判明是否适合当场调解。 B.记录调解事项,告知双方责任义务,当事人确认调解结果。 C.敦促双方当场履行调解协议,完成现场调解工作。 D.对成功调解过程应予以记录。无法达成现场调解的,应进一步依法办理。 [填空题]轨面标准线复测结果与原轨面标准线误差不得大于( )。特殊情况需调整轨面标准线时,由供电、工务部门共同确认,并经铁路局批准。
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