在意外伤害保险中，（）是战争成为特约保意外伤害的可保条件。 A.战争规模较大 B.战

某实施监理的工程，合同工期15个月，总监理工程师批准的施工进度计划如图5-8所示。

图5-8 施工进度计划

工程实施过程中，发生如下事件：

事件1：项目监理机构对A工作进行验收时发现质量问题，要求施工单位返工整改。

事件2：在第5个月初到第8个月末的施工过程中，由于建设单位提出工程变更，使施工进度受到较大影响。截止第8个月末，未完工作尚需作业时问见表5-21。施工单位按索赔程序向项目监理机构提出了工程延期的要求。

事件3：建设单位要求本工程仍按原合同工期完成，施工单位需要调整施工进度计划，加快后续工程进度。经分析得到的各工作有关数据见表5-21。

表5-21 相关数据

针对事件2，项目监理机构应批准的工程延期时间为多少说明理由。

微生物学的发展历史可概括为三个阶段，即

（一） Friends play an important part in our lives, and although we may take the friendship for granted, we often don’t clearly understand how we make friends. While we get on well with a number of people, we are usually friends with only a very few, for example, the average among students is about 6 per person. In all the eases of friendly relationships, two people like one another and enjoy being together, but beyond that, the degree of intimacy between them and the reasons for their shared interest vary enormously. As we get to know people we take into account things like age, race, economic condition, social position, and intelligence. Although these factors are not of prime importance, it is more difficult to get on with people when there is a marked difference in age and background. Some friendly relationships can be kept on argument and discussion, but it is usual for close friends to have similar ideas and beliefs, to have attitudes and interests in common--they often talk about ’ being on the same wavelength’. It generally takes time to reach this point. And the more intimately involved people become, the more they rely on one another. People want to do friends favors and hate to break a promise. Equally, friends have to learn to put up with annoying habits and to tolerate differences of opinion. In contrast with marriage, there are no friendship ceremonies to strengthen the association between two people. But the supporting and understanding of each other that results from shared experiences and emotions does seem to create a powerful bond, which can overcome differences in background, and break down barriers of age, class or race.

To strengthen friendly relationship, people______

A．must hold friendship ceremonies

B． have to eliminate differences in background

C．should make friends with those who are of the same age and of the same race

D．should support and understand each other through shared experiences and emotions

中国农历的哪个节气有着北方吃饺子、南方吃汤圆的习俗？

在点到点的数据传输时钟同步中，外同步法是指接收端的同步信号是由

A．自己产生的

B．信息中提取的

C．发送端送来的

D．接收端送来的