下列不是抗红细胞自身抗体产生的可能机制的是（） A.病毒、细菌感染可激活多克隆B细胞

--- How come your father can read books in German?

--- Well, he____on a project with some German engineers for 3 years when he was young.

A．worked

B．was working

C．had worked

D．would work

下边是某同学整理的“澶渊之盟”资料卡片。卡片中表述错误的是，澶渊之盟的

A．时间    

B．订立双方

C．内容    

D．影响

不合法的main函数命令行参数表示形式是（ ）。

A．for(表达式1；0；表达式3)

B．for(表达式1；1；表达式3)

C．for(表达式1；表达式3；)

D．for(；；表达式3)

It’s beyond our comprehension that Jim, who tops the class in English, ________ have difficulty translating such a simple sentence.

A．shall

B．should

C．might

D．must

信息管理主要包括哪些内容？