SIRS是指：（）。
A. 休克指数
B. 肺毛纫血管楔压
C. 全身炎症反应综合征
D. 中心静脉压
E. 呼吸窘迫综合征
传播SARS（）传播流脑（）
A. 空气
B. 水、食物
C. 蚊虫
D. 土壤
E. 母婴
Which four are true？（）
A. Has-a relationships should never be encapsulated.
B. Has-a relationships should be implemented using inheritance.
C. Has-a relationships can be implemented using instance variables.
D. Is-a relationships can be implemented using the extends keyword.
E. Is-a relationships can be implemented using the implements keyword.
F. An array or a collection can be used to implement a one-to-many has-a relationship.
G. The relationship between Movie and Actress is an example of an is-a relationship.
B细胞活化的辅助受体（）
A. BCR复合体
B. CD19/CD21/CD81/CD225
C. 协同刺激分子
D. C3d受体
E. BCR识别特异性抗原
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