【简答题】B T om had got a summer job. He worked in a park every morning. he usually greeted the visitors at a gate, he answered their questions and gave them a map of the park. In the afternoon, he helped to s...
【判断题】碳水化合物是人体热能最主要和最经济的来源。
【判断题】数码管动态显示的优点是显示稳定,显示亮度高,程序简单。
【单选题】下面关于楼梯说法错误的是
A.
用梯段命令产生的楼梯可以对踢面或边界线段进行编辑
D.
应用多层顶部标高参数建议多层建筑的标高应等距分开
【判断题】数码管动态显示的优点是占用的硬件资源小,耗电量小。