题目内容

铝LY12—CZ的材料状态符号“CZ”表示()。

A. 淬火、人工时效
B. 淬火、自然时效
C. 退火、自然时效
D. 退火、人工时效

查看答案
更多问题

Several people in an Information Technology (IT) department are asking for fileset updates that the system administrator received earlier that day on CD-ROM. The system administrator created an install directory on their machine and made it available to everyone. Which of the following commands will allow the system administrator to copy the images from the CD-ROM to the install directory?()

A. smit bffcreate from the target directory
B. tar -xvf /dev/cd0 from the target directory
C. restore -xvqf /dev/cd0 from the target directory
D. mount the cdrom on /cdrom and cp /cdrom/* . from the target directory

海船上的舵是垂直安装在船尾作操纵用的装置,其主要作用为() ①保持航向; ②改变航向; ③使船舶旋转; ④改变航速。

A. ①、③、④;
B. ②、③、④;
C. ①、②、③、④;
D. ①、②、③。

泵浦(激励)

古典意义和现实意义上的儿童文学是不一样的。

A. 正确
B. 错误

答案查题题库