S7-200 Smart SR40 AC/DC/RLY 表示PLC的供电电源为交流电。

第1题

S7-200 SMART PLC系列的SR40，40表示（）。

A、40个IO点

B、40个输入点

C、40个输出点

D、以上都不对

点击查看答案

第2题

S7-200 SMART PLC 最多有（）个高速计数器。

A、2

B、3

C、4

D、6

点击查看答案

第3题

S7-200 Smart PLC与S7-200PLC使用的编程软件不一样，Smart使用STEP 7-MicroWIN SMART。

点击查看答案

第4题

S7-200 smart系列PLC中根据步的当前状态,步可以分为和

A．活动步

B．所有答案都不正确

C．半活动步

D．非活动步

点击查看答案

第5题

S7-200 Smart PLC的硬件通信接口除了有RS485接口外，使用最多且更方便的是以太网接口。

点击查看答案

第6题

完形填空????New comers to the United States are of...

完形填空

New comers to the United States are often1by the schools. American schools2so different

from schools they know in3of the world. American education is based on the4children5learn

to think6. The school should be the7they learn to do this.8, children learn the "three R's"

(Reading, Writing and Arithmetic), history and government(often called Social Studies) and many other

9. They also learn10be independent(独立的), how to make their own judgment(判断), and how

to develop their own11and interests. The American teacher does not12children in her class to sit

13folded quietly and to say14. She wants them to listen attentively, to ask questions. She knows

that15children learn from books is16. She also knows that, it is necessary for them to know how

to use this17their18development. During Open School Week, parents have a19see how

American education20.

( )1. A. happy

( )2. A. some time

( )3. A. other

( )4. A. opinion

( )5. A. need

( )6. A. of

( )7. A. place

( )8. A. From school

( )9. A. lessons

( )10. A. when to

( )11. A. ability

( )12. A. think

( )13. A. with

( )14. A. something

( )15. A.that

( )16. A. important

( )17. A. study

( )18. A. growing

( )19. A. ability

( )20. A. develops

B. afraid

B. sometime

B. the other

B. idea

B. needed

B. against

B. space

B. Out school

B. knowledge

B. how to

B. skill

B. want

B. across

B. anything

B. which

B. unimportant

B. work

B. growth

B. possibility

B. learns

C. glad

C. sometimes

C. another

C. promise

C. dare

C. for

C. room

C. By school

C. subjects

C. what to

C. abilities

C. let

C. over

C. nothing

C.不填

C. necessary

C. learning

C. future

C. interest

C. goes

D. surprised

D. sometimes

D. all

D. conclusion

D. dared

D. with

D. area

D. In school

D. objects

D. where to

D. skills

D. make

D. above

D. much

D. what

D. useless

D. aim

D. tomorrow

D. chance

D. works

点击查看答案

第7题

According to the speaker, SMART means “clever”.

点击查看答案

第8题

S7-200-224XP有 6个高速计数器，他们可以设置12种不同的工作模式。

点击查看答案

S7-200SmartSR40AC/DC/RLY表示PLC的供电电源为交流电。（)