三轴剪切试验是指土样在压力室内可以受到竖向和侧向压力的作用( )
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Dear Mum,Thanks for your email. I'm really 1 I haven't written before now. I 2 a fantastic time in Germany. The university is great, but3here is 4expensive for me and I've5nearly all my money. Can you 6me some money, please? I 7 I'll 8 you back when I come home. Next week 9to get a job. Then perhaps I can 10some money for next term. But until then I need a bit more to pay my room. Thanks a lot, Mum!Love,Caroline
使用ls命令查看目录内容时,ls -al表示的是?
A. 显示当前目录内容
B. 以长格式显示当前目录中隐藏文件的内容。
C. 以长格式显示当前目录内容。
D. 以长格式显示当前目录内容,并显示隐藏文件内容。
配置文件通常保存在哪个目录下面?
A. /etc
B. /usr
C. /var
D. /root
使用mkdir建立子目录时,如果同时需要创建父目录,则使用下面哪个选项?
A. -r
B. -c
C. -p
D. -a