更多"[单选题]A good __ is the first step to"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]在西门子STEP7,执行下载的命令是()。
A. Upload
B. Download
C. Upload Station
[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]STEP 7可以将用户程序(OB、FC、FB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]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]: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
[单选题]What does the customs officer check first?( )
A. Customs Declaration.
B. Last Port Clearance.
C. Narcotic.
D. Import Cargo Manifest.
[填空题]When the village girl first came to this big city to look for a job, she did not ( ) it.
[判断题]用户可以在STEP7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
[判断题]STEP 7可以将CPU中的程序和组态信息上载到PG/PC的项目中来。但只能将一个PLC的全部内容整个上载到项目中,不能单独上载用户程序块或硬件组态信息。( )
A.正确
B.错误
[判断题]在使用西门子STEP-7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
