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[背景资料] 某土石坝分部工程的网络计划如下图，计算工期为44天。根据技术方案，确定A、D、I三项工作使用一台机械顺序施工。 [*] 如按D→A→I顺序组织施工，则网络计划变为如下图所示： [*] (1)计算工期是多少天 (2)机械在现场的使用和闲置时间各是多少天
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客户给秘书小张打来电话,要求对已商定的下周会议议程作调整,但理由是不合情理的。小张开始时认真接听并耐心解释。随后有其他客户来访,小张边听电话边关照来访者。客户固执己见,喋喋不休,小张按捺不住地对着电话大声说：“会议安排早已通知所有客户,不可能再改变,你自己调整吧!” 小张在接听的开始阶段符合有效沟通的( )原则。
Taking a Nap During the Day Medical experts say most Americans do not get (51) sleep. They say more Americans need to rest for a short period in the middle of the day. They are advising people to sleep lightly before (52) with other activities. One study earlier this year found that persons who sleep for a few minutes during the day were less (53) to die of disease. The study followed more than 2,300 Greek adults (54) about six years. Adult who rested for half an hour (55) three times a week had a 37 percent lower risk of dying from heart disease than those who did not nap. Study organizers said the strongest evidence was in working men. They said naps might improve (56) by mitigating tension caused by work. Some European and Latin American businesses have supported the (57) of napping for many years. They urge people to (58) work, go home and have a nap before returning. In the United States, some companies let workers rest briefly in their offices. They believe this reduces in their offices. They believe this reduces (59) and accidents, and (60) increases the amount of work a person can do. Sleep experts say it is likely that people make more mistakes at work than at other times. They say people should not carry out important duties when they feel (61) . And they say the best thing to do is to take a nap. About twenty minutes of rest is (62) you need. Experts say this provides extra energy and can increase your effectiveness (63) the end of the day. But experts warn that a nap (64) last no more than twenty to thirty minutes. A longer nap will put the body into deep sleep and waking up will be (65) .
某教员到一所中学进行教育达标验收工作时听了一节“培智班”的语言课，教师较好地完成了教学任务。美中不足的是，在教师讲课期间总有一位学生未经教师许可就离开座位跑到讲台上去领读、表演，甚至跑到教室后面的饮水处去喝水。事后了解到，这位学生是“培智班”中相对聪明的学生，是同班学生中识字多、发音准、吐字清楚的一位。该任课教师对该生的这种行为也进行过多次的教育，但无济于事。 试结合相关理论分析并帮助这位任课教师解决这一班级教育现象。
公文格式不规范,就会影响公文的( )效力,甚至根本就没有法定效力。
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