返青分蘖期是指移栽到抽穗以前的时期。
参考答案:错
— Millions of Chinese had expected Liu Xiang to win another gold medal for the 110-meter hurdle.
— Poor Guy, he was _____. [ ]
A. under control
B. under pressure
C. under way
D. under discussion
女,30岁,风湿性心瓣膜病二尖瓣狭窄病史3年,突然出现大咯血()男,50岁,主动脉瓣狭窄并关闭不全病史20余年,突然出现快速房颤伴血压下降()男,40岁,风湿性心瓣膜病二尖瓣关闭不全病史10年,发热1个月,夜间阵发呼吸困难2周,超声心动图示二尖瓣赘生物伴腱索断裂()
A.电复律
B.静注毛花苷丙
C.手术换瓣
D.硝酸酯类制剂
E.静注速尿