简述混凝土试件的标准养护条件。
参考答案:
①、标准养护室温度为20±2℃,相对湿度为95%以上;
②、或温度为20±2℃的不流动的Ca(OH)2{氢氧化钙}饱和溶液。
患者女,70岁,因“间断胸闷、呼吸困难1周”来诊。于外院诊治考虑为“冠心病、心绞痛”,给予“硝酸酯类、美托洛尔”等治疗,效果欠佳,其间晕厥5次,最长1次意识丧失达7~8min,伴排尿、排粪失禁。遂转入我院,追问其病史,发病前曾坐长途汽车8h。查体:P110次/min,BP140/90mmHg;口唇发绀,P2>A2,腹平软,双下肢无水肿。
该患者最可能的诊断是()
A.心律失常
B.冠心病、心绞痛
C.肺栓塞
D.肺动脉高压
E.血管迷走性晕厥
An investor buys a 15-year, 10 percent annual pay coupon bond for $1000. He plans to hold the bond for 5 years while reinvesting the coupons at 12 percent. At the end of the 5-year period he feels he can sell the bond to yield 9 percent. What is the expected realized (horizon) yield()
A. 10.0%.
B. 11.8%.
C. 11.2%.