更多"[单选题]A good__( )__is the first"的相关试题:
[单选题]问题 3： What is the last step for dropping anchor in this dialogue?( )
A. To switch off the winch.
B. To cross the bar.
C. To open the anchor light.
D. To hoist the anchor ball.
[单选题]STEP7用户程序中，背景数据块是()
A.(IB)
B.(OB)
C.(FB)
D.(DB)
[单选题]在STEP7中，初始化组织块是()
A.OB1
B.OB10
C.OB35
D.OB100
[单选题]在西门子STEP7,执行下载的命令是()。
A.Download
B.Upload
C.Upload Station
[多选题]下列哪些属于Step7中的复杂数据类型？（ )
A.ARRAY
B.STRUCT
C.DATE_AND_TIME
D.TIME_OF_DAY
[单选题]STEP7的标准版配置了哪3种基本的编程语言。()
A.STL、FBD、LAD
B.SFC、LAD、STL
C.STL、LAD、Graph
D.CFC、LAD、STL
[单选题]step7用()的形式管理用户编写的程序及程序运行所需的数据。
A.文件块
B.数据库
C.二进制代码
D.目录
[单选题]- Peter, don't step on the grass.
- ____________.
A.It doesn't matter
B.I can't do it
C.Don't worry
D.Sorry, I won't do it again
[判断题]STEP7的“---(N)---”指令名称是RLO正跳沿检测。
A.正确
B.错误
[单选题]()在step7程序中是主程序循环块，在任何情况下，它都是需要的。
A.FB1
B.DB1
C.FC1
D.OB1
[判断题]STEP7可以将用户程序(OBFCFB和DB)下载到PLC的CPU中,但硬件组态信息(SDB)不能下载。
A.正确
B.错误
[判断题]在使用西门子STEP7编程中,一个FB块在每次调用时,不能使用不同的背景数据块。
A.正确
B.错误
[判断题]用户可以在STEP 7中编写程序和对硬件进行组态, 并通过编程器将用户程序和硬件组态信息下载到CPU, 但不可以从CPU上载到编程器。( )
A.正确
B.错误
[单选题] — Congratulations! You won the first prize in today's speech contest.
— ________
A. Yes, I beat the others.
B. No, no, I didn’t do it well.
C. Thank you.
D. It's a pleasure.
[单选题]:About the first speaker, which statement is correct?( )
A.He has never been foreign country before.
B.He knows the city very well.
C.He has around the world many times.
D.According the dialog, he should be captain on board
