患者60岁。有高血压病史10年,平时血压160/90mmHg,不规律应用降压药物,因情绪激动,突然出现呼吸困难而入院。查体:血压210/110mmHg,脉率120次/分,双肺散在哮鸣音及大量水泡音,心率140次/分,节律不整,肝脾未及。心电图P波消失,代之f波,室律140次/分,节律不整,胸片双肺底呈毛玻璃样改变,心界向左扩大。血气分析:PH值7.5,氧分压56mmHg,二氧化碳分压25mmHg,血乳酸1.2mmol/L,血酮体10mmol/L。做出正确诊断后,为改善上述症状,可以应用下列哪些药物()
A. 阿替洛尔
B. 西地兰
C. 速尿
D. 喘定
E. 异搏定
F. 硝普钠
G. 氟美松
H. 吗啡
I. 异丙基肾上腺素
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You are working in an online transaction processing (OLTP) environment. You realize that the salary for an employee, John, has been accidentally modified in the EMPLOYEES table. Two days ago, the data was in the correct state. Flashback logs generated during last two days are available in the flash recovery area. Which option would you choose to bring the data to the correct state while ensuring that no other data in the same table is affected?()
A. perform pointintime recovery
B. perform a Flashback Table operation to restore the table to the state it was in two days ago
C. perform a Flashback Database operation to restore the database to the state it was in two days ago
D. perform Flashback Versions Query and Flashback Transaction Query to determine all the necessary undo SQL statements, and then use them for recovery
薪酬调整的主要类型:奖励性调整、()、效益调整、工龄调整。
接通电瓶时,MFD正常显示,而当启动发动机时MFD黑屏,故障可能是()
A. 主电瓶故障
B. MFD故障
C. 备用电瓶故障
维生素E是一种溶解于油中的维生素,它是一种抗氧化剂,能清除氧自由基,从而保护细胞膜上的脂质,而脂质的氧化与冠心病、癌症、衰老等密切相关。总之,维生素E是人体不可缺少的营养成分。但是“需要”并不意味着越大越好。维生素E缺乏在人群中很少发生,只有几种人可能存在问题:胆汁缺乏或脂肪代谢困难的人;罕见的基因异常导致缺乏维生素E转移蛋白的人;因早产而体重严重不足的婴儿。这些情况在人群中都不易出现。这段文字所传达的观点是:()
A. 正常人没必要补充维生素E
B. 应该正确认识维生素E的作用
C. 人们对维生素E的认识存在误区
D. 要特别注意可能缺乏维生素E的人