双作用叶片泵的转子每旋转一周，完成（）吸油和压油的过程。
参考答案：两次
对该患儿活动量的指导错误的是
A．向患儿及家长强调休息的重要性B．一般起病2周内患儿应卧床休息C．待水肿消退后，可下床轻微活动D．肉眼血尿消失，血压降至正常可上学，但避免体育活动E．Addis计数恢复正常后，恢复正常活动
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.
