救治感染性休克时应采取
A．边抗休克边治疗感染B．抗休克好转后治疗感染C．先纠正酸中毒D．先抗感染E．首先输血
参考答案：A
The number of students who took part in the competition last week ________ more than 1500.
A．reach
B．were
C．is
D．was
虹和晕的形成，属于（）作用。
A、瑞利散射
B、米散射
C、几何光学散射
