Mary thinks that people don’t need to do much travel nowadays as a result of()
A. less emphasis on personal contact.
B. advances in modern telecommunications.
C. recent changes in people’s concepts.
D. more potential damage to the area.
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(四) 某城市公交企业拥有公交营运车辆1000辆,全市经营的公交线路长度为2100千米,其中有公共交通线路通过的街道长度为1500千米;该城市用地面积为40。平方千米;公交公司近期提出:在公共交通车辆既定的条件下,要通过优化线网密度不断提高城市居民的出行方便程度,使乘客步行距离不超过1/2站距。该城市乘客平均乘距为6千米,每条线路平均车辆数为12辆,车辆在营运线路上每完成一个周转所耗费的时间平均为60分钟。 该城市公共交通线网密度的计算值为______千米/平方千米。
A. 3.75
B. 4.0
C. 4.25
D. 4.5
E. 4.75
根据说明结合问题1的解答,指出在该系统的顶层数据梳图中应有哪些数据流。请采用说明中的词汇给出这些数据流的起点、终点以及数据流名称,下表给出了数据流的部分信息,请填充空缺处。序号起点终点数据流名称1 (1) 网上作业提交与管理系统作业申请2 (2) 网上作业提交与管理系统提交的作业3网上作业提交与管理系统 (3) 需完成的作业4网上作业提交与管理系统 (4) (5) 5网上作业提交与管理系统 (6) 作业申请6网上作业提交与管理系统 (7) (8) 7 (9) 网上作业提交与管理系统选课学生名单8 (10) 网上作业提交与管理系统 (11) 9 (12) 网上作业提交与管理系统账号和密码10 (13) 网上作业提交与管理系统账号和密码
In a few months’ time you are going to graduate from university. How do you think your college years have prepared you for your future life Write an essay of about 400 words on the following topic:What I have learned from my years at universityIn the first part of your essay you should state clearly your main argument, and in the second part you should support your argument with appropriate details. In the last part you should bring what you have written to a natural conclusion or make a summary. Marks will be awarded for content, organization, grammar and appropriateness. Failure to follow the above instructions may result in a loss of marks. Write your essay on ANSWER SHEET FOUR.