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
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
Definition. A flow network is a directed graph G = (V, E) with two distinguished vertices: a source s and a sink t. Each edge (u, v) ∈ E has a nonnegative capacity c(u, v). If (u, v) ∉ E, then c(u, v) = 0
A ring that contains at least one heteroatom (an atom other than carbon) is called a heterocycle, and a substance based on a heterocyclic ring is a heterocyclic compound. Heterocyclic compounds containing N, O or S are by far the most common
一、词汇和语法（本大题共 20 小题，每小题 1 分，共 20 分） 根据句子的意思选择一个正确的答案，错选、多选或未选均无分。 1. It‘s______ by coach from Melbourne to Sydney. A. a nine hour‘s journey B. a nine hour journey C. a nine hours‘ journey D. a nine-hours journey
Modular arithmetic – Used to define a finite field – a = b mod n means that if a and b are divided by n they produce the same remainder – a*b mod n can result in 0 even if a and b are not 0
Iterating Block ciphers Definition A product cipher combines two or more transformations in a manner intending that the resulting cipher is more secure than the individual components. Definition An iterated block cipher is a block cipher involving the sequential repetition of an internal function called a round function. Parameters include the number of rounds Nr, the block bitsize n, and the bitsize k of the input key K from which Nr subkeys Ki (round keys) are derived. For invertibility (allowing unique decryption), for each value Ki the round function is a bijection on the round input
