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如何建立和执行Shell脚本文件？如何使一个Shell脚本在当前Shell种运行？

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如何设置用户自己的工作环境？

Choose the best answer to complete each sentence.6. Ellie__ listenting to music when the teacher spoke to her.A. weren'tB. isC. was7. I was taking a nap when someone _ the door.A. knockedB. knocksC. knocking8. What ___ you _ when Mom cooked last night?A. was; doingB. were; doingC. are ; doing9. She looking when we crossed the road.A. weren'tB. wasn'tC. didn't10. I was in class at 3:00 p.m yesterday.A. to studyB. studyC. studying

能力能够直接影响人们的活动效率。

A. 对
B. 错

下列关于 ESX 主机提供的虚拟机平台的说法中，哪一项是正确的？2

A. 仅独立于主机系统
B. 其独立性基于客户操作系统
C. 仅独立于物理硬件
D. 独立于主机系统和物理硬件