4；3；2；3；7；3
保险公估机构应当自收到中国保监会作出是否批准延续许可证有效期的决定之日起（）日内向中国保监会交回原证；准予延续有效期的，应当领取新许可证。
A.10
B.15
C.20
D.30
First-aid experts stress that knowing what to do in an emergency can often save a life, specially in accident cases.
