A 群脑膜炎球菌多糖疫苗 拼音名: A Qun Naomoyanqiujun Duotang Yimiao 英文名:Group A MeningococcaI Polysaccharide Vaccine 书页号:2005 年版三部-34 本品系用 A 群脑膜炎奈瑟菌培养液,经提取获得的荚膜多糖抗原,纯化后加入适宜稳定剂后冻干制成。用于预防 A 群脑膜炎球菌引起的流行性脑脊髓膜炎
1、解: (1) P{只订购 A 的}=P{A(B∪C)}=P(A)-{P(AB)+P(AC)-P(ABC)}=0.45-0.1.-0.08+0.03=0.30. (2) P{只订购 A 及 B 的}=P{AB}-C}=P(AB)-P(ABC)=0.10-0.03=0.07 (3) P{只订购 A 的}=0.30
We are going to consider the forces exerted on a material. These can be external or internal. External forces come in two flavors: body forces(given per unit mass or volume) and surface forces(given per unit area). If we cut a body of material in equilibrium under a set of external forces along a plane as shown in fig. 1. and consider one side of it we draw two conclusions: 1 the equilibrium provided by the loads from the side taken out is provided by a set of forces that are distributed among the material particles adjacent to
The location of the dehydration factory must be considered very carefully, because, whereas at one time proximity to the source of raw materials was of paramount importance, availability of an adequate labour force and the provision for effluent disposal will, perhaps, constitute a more pressing requirement. A rural environment is obviously better than a location in a highly industrialised area, because the operation involves the utilisation of a considerable amount
A mass spectrometer produces a spectrum of masses based on the structure of a molecule. It is a spectrum or plot of the distribution of ion masses corresponding to the formula weight of a molecule, fragments derived from the molecule, or both