抢险救助
参考答案:
是指救助人或有关机关对处于紧急危险的船舶或其他财产、人员采取的紧急救助。
If no other unbiased estimator of the same parameter has a sampling distribution with smaller variance, the estimator can be best described as:()
A. efficiency.
B. unbiasedness.
C. consistency.
泻下作用极微并有止血作用的是()
A.大黄
B.酒大黄
C.熟大黄
D.大黄炭
E.清宁片