在软件项目管理中可以使用各种图形工具来辅助决策，下面对Gannt图的描述不正确的是（）
A．Gannt图表现各个活动的顺序和它们之间的因果关系
B．Gannt图表现哪些活动可以并行进行
C．Gannt图表现了各个活动的起始时间
D．Gannt图表现了各个活动完成的进度
参考答案：A
解析：
Gantt图(甘特图)以水平线段表示任务的工作阶段；线段的起点和终点分别对应着任务的开工时间和完成时间；线段的长度表示完成任务所需的时间。图是一个甘特图的例子。
从甘特图上可以很清楚地看出各子任务在时间上的对比关系。在甘特图中，每一任务完成的标准，不是以能否继续下一阶段任务为标准，而是以必须交付应交付的文档与通过评审为标准。因此，在甘特图中，文档编制与评审是软件开发进度的里程碑。
甘特图的优点是标明了各任务的计划进度和当前进度，能动态地反映软件开发进展情况。缺点是难以反映多个任务之间存在的复杂的因果和逻辑关系。
| Cloze. | ||||
| Many people find that regular physical activity gives them an unexpected benefit. They sleep better and wake up feeling more 1 , in part due to increased amounts of deep sleep. Deep sleep may play a role in the body restoring (恢复) itself 2 , as opposed to REM (rapid eye movement) or dreaming sleep. Researchers have found that physical exercise, especially 3 in the afternoon or early evening, produces more 4 early in the night. 5 can also help you get a better night's sleep in a number of indirect ways. The relaxation and tiredness 6 by exercise can improve sleep. Exercise encourages weight loss and also may 7 depression. Exercising later in the day can also help delay the 8 drop in your body's temperature. The 9 of exercise are especially important for older people, 10 exercise has been shown to increase the amount of sleep senior adults get in a night and reduce the time it takes to fall asleep. But be sure you finish exercising at least 4 hours before bedtime-working out later than that could leave you too excited to fall asleep easily. | ||||
|