核酸的紫外吸收特性来自()
A.脱氧核糖
B.核糖
C.嘌呤嘧啶碱基
D.磷酸二酯键
E.磷酸核糖
参考答案:C
男,65岁。硬膜外阻滞下经 * * 前列腺切除术。手术开始80分钟,患者出现不安,轻度呼吸困难,血压升高,心率减慢。最可能是由于()。
A.心肌梗死
B.手术部位出血
C.血容量过多
D.硬膜外阻滞不全
E.高钠血症
Downing Street is fighting fiercely for something it hopes it shall control: its reputation. "[The BBC] is now saying, ’Nobody ever said the prime minister told a lie,’ but that’s exactly what they’re saying," Alastair Campbell, Blair’s director of communications, told Newsweek. "That’s pretty heavy."
A.could
B.would
C.can
D.will