若a﹣b=2010，c+d=2011，则（b+c）﹣（a﹣d）的值为（ ）。
1
以下杂质应使用的试剂是
易炭化物（）
A．硫氰酸胺
B．硫酸
C．硫代乙酰胺
D．氯化钡
E．硝酸银检查
The nurse is caring for a client with mild active bleeding from placenta previa. Which of the following observations indicates that an emergency cesarean section may be necessary（）
A. Increased maternal blood pressure of 150/90 mmHg.
B. Decreased amount of vaginal bleeding.
C. Fetal heart rate of 80 beats per minute.
D. Maternal heart rate of 65 beats per minute.
