In order to increase reliability， minimize collisions and establish a large number of systems on an Ethernet segment， which of the following options should be selected for the Ethernet network？（） 10BaseT。 Switched 10BaseT。 Switched 100BaseT Half-Duplex。 Switched 100BaseT Full-Duplex。
红细胞衰老时，下列何项是错的（） 各种酶活动减少。 ATP增加。 脂质减少。 Na↑<+>K↑<+>增多。
A file named "core" exists in the current directory. Which of the following commands should be used to determine what created the "core" file?（） dump -t core 。 strings core 。 trace -a core 。 crash core /unix_u。
进行环境影响预测时，应考虑（）对外来影响的自净能力。 建设项目。 环境系统。 社会环境。 自然环境。
Which of the following problems has occurred when a menu appears and prompts the user to "copy a dump to external media?（） The external dump device is full. 。 The dump device was set to /dev/hd7 before the dump happened. 。 The boot failed while copying the dump from paging space to a file. 。 The dump device was not set to a paging device before the dump happened.。
Which of the following benchmarking ratings cover essentially the same performance metrics associated with commercial applications for IBM UNIX systems？（）
