成人正常血压标准为() ["A.收缩压<18.6kPa(140mmHg),舒张压<12.0kPa(90mmHg)","B.收缩压≤18.8kPa(141mmHg),舒张压<12.lkPa(9lmmHg)","C.收缩压≤18.6kPa(140mmHg),舒张压≤12.0kPa(90mmHg)","D.收缩压<21.3kPa(160mmHg),舒张压<12.6kPa(95mmHg)","E.收缩压≤21.3kPa(160mmHg),舒张压≤12.6kPa(95mmHg)"]
下列哪项属临界高血压() ["A.18.6/10.3kPa(140/77mmHg)","B.20/12.0kPa(150/90mmHg)","C.21.3/10.6kPa(160/80mmHg)","D.21.3/12.6kPa(160/95mmHg)","E.22.6/13.3kPa(170/110mmHg)"]
生长抑制物质包括生长()剂和生长()剂两类。
实践中一般不将IAA直接施用在植物上,这是因为IAA在体内受()酶破坏效果不稳定的缘故。
下列哪种疾病与Austin-Flint杂音有关() ["A.主动脉瓣狭窄","B.主动脉瓣关闭不全","C.二尖瓣狭窄","D.二尖瓣关闭不全","E.肺动脉瓣狭窄"]
ABA抑制大麦胚乳中()的合成,因此有抗()的作用。