第20题:[单选题]4.We say that commodity Y is K-intensive with respect to X when: A.A.more K is used in the production of Y than X B.B.less L is used in the production of Y than X C.C.a lower L/K ratio is used in the production of Y than X D.D.a higher K/L is used in the production of X than Y 参考答案:C
第23题: [单项选择]男性,38岁。突发撕裂样胸背部疼痛伴大汗淋漓1小时。查体:心率100次/分,右上肢BP100/60mmHg,左上肢BP150/70mmHg。听诊可闻及颈部血管杂音,胸骨左缘3、4肋间叹气样舒张期杂音。心电图检查:窦性心律,Ⅱ、Ⅲ、aVF导联T波倒置。X线胸片:上纵隔稍宽。经服用硝酸甘油,疼痛未缓解。目前首要的处理措施是() A. 镇静止痛 B. 有效控制血压 C. 强心利尿 D. 继续静脉给予硝酸甘油 E. 给氧 参考答案:B