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宫外孕I号方功效与作用

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人参丁香散1功效与作用

随机选择6岁组儿童500名进行免疫接种，随访观察了5年后发现有80%的免疫接种者未患所研究疾病。以下说法正确的是（）。

A. 该疫苗无效，因为仍有20%的儿童患了该疾病
B. 该疫苗有效，因为有80%的儿童未患该疾病
C. 能下结论，因为未进行统计学检验
D. 不能下结论，因为未设对照组
E. 不能下结论，因为观察时间不够长

血证的治疗原则为（）.

A. 治火、治气、治血
B. 理气开郁、调畅气机、怡情易性
C. 益气、养阴、补血、调和营卫
D. 清热润燥、养阴生津
E. 补益气血、滋阴助阳

根据下列材料，请回答下面的题目Mr．Reece is(Example：0)interesting old man．Mr．Reece worked 41 a farm．He and his wife 42alot of things and they had some cows．Every day they worked hard43morning till night．One day，Mr．Reece44 his wife,“Let’S go to Portsmouth next Sunday．We can have a good lunch there and then we can go to thecinema．”His wife was very45when she heard tllii，because they always ate a lot，and she didn’t like46three times a day．They went to Portsmouth47and walked about for an hour．Then，48it was twelve0’clock，they wanted to have lunch．They looked at four restaurants．In front of one restaurant，they saw a notice．n 49，“Lunch：12：30 t02：30，1．5 pounds．”“Well，that’s great．”Mr．Reece said，“We can eat for twohours for 1．5 pounds here!This is the50for US．”

A. in plane
B. by a plane
C. in a plane