最新中职数控技术应用专业实用英语授课教案：4.2
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While wiring在布线的时候；
as far as possible尽可能的远
the output line, the high-voltage line和the electric equipment都是介词from的宾语。
▲Each group chooses one student to read the whole text, and each group chooses another student to grade their reading. The teacher also grades it. See who will get the best marks.
▲The students are asked to read the supplementary material after class.
▲1. The students are asked to read the text again and try to find the answers to the following questions.
1) How many input points and output points does the PLC in Figure 4-2-1 have?
2. The students read the dialogue by themselves.
3. The teacher asks four students to read the dialogue.
▲1. Exercises II and IV are their assignment to be done in the textbook in class.
2. Four students form a group and 1) discuss the whole text. 2) discuss the four questions above.
To cope with difficult points：
1. In Fig. 4-2-1, the input terminals are indicated as X and they should be connected to a PLC’s external input components, such as a sensor, a contractor or a switch.图4-2-1中,输入端子用X来表示，它们应与PLC的外部输入元件相连，如传感器、接触器和开关。
2. The students read the words after the teacher so that the students can pronounce each word correctly, especially long words, such as configuration, component, equipment, interference, etc.
▲ 1.The students are asked to read and write the key words.
2. The teacher asks one student to read any words from the key words and he/she asks anotherstudentto spell them.
6. Summary
Step IV Dialogue
Step V Exercises in Class
Step VI Supplement
Step VIIHomework
Step VIIIБайду номын сангаасelf-checklist
▲The students have a dictation of new words of Lesson One:
2) What does X in Figure 4-2-1 stand for?
3) What is the voltage with which the input circuits are supplied from inside the PLC?
4) Why must input line be kept away from output line as far as possible?
课题
Lesson 2 The Input Circuit of PLC（U4-L2）
授课
日期
年月第课时
教学
目标
知识目标：掌握全部生词；完全理解课文并掌握课文中英语句子的结构。
能力目表：学生能用英语表达课文的全部内容。
素质目标：通过学习本课，提高学生专业素质和英语素质。
教材
分析
本课生词不多，但有几个不太容易记忆的长单词；相对其他课文，本课文较长，但是句子结构不难，如果学生学过相应的专业知识，本课课文并不太难学。
3)interference干扰，动词是interfere
4)equipment设备;是一个不可数名词，一套设备，不可说an equipment,而是a set of equipment.
5)configuration外形，布局;这个单词长，应根据读音记忆，con-fi-gu-ration;或先记住单词figure,然后前面加con（con表示“全、共）,后面去掉e,加ation.
▲1. The teacher reads the whole text and the students are asked to think about it and get the general idea.
2. The teacher switches on the projector, reads the whole text with his/her teaching pointer pointing to the sentences he/she is reading..
Step II. Vocabulary study
1. terminal端子
2. voltage电压,伏特数
3.sensor传感器
4.interference干扰
5. component元件
6. equipment设备
7.configuration外形，布局
8.model样式,型,模型,
9. generally通常，一般地，概括地
教
学
后
记
教学内容
教学过程
Step 1 Lead-in and Warm-up
.1. Dictation.
2. Ask the students how much they know about input circuits.
Do they know the words“terminal, sensor, voltage, component”etc?
1. current 2. fuse 3. extension 4. supply 5. wiring 6. emergency 7. switch 8. direct
▲1. The students have previewed the new words of this lesson, so the teacher will ask one student to read them.
教学
重点
词汇：. voltage, equipment, avoid
句子：….the input terminals are indicated as X and they should be connected to a PLC’s external input components, such as….
▲The teacher gives a brief account of the text
▲1. Helen的第1句话“Tom, can you tell me what does I/O point mean?”的标准说法应当是“Tom, can you tell me what I/O point means?”
a PLC’s external input修饰components.
2.The input circuits are all supplied with 24V DCfrom inside thePLC.输入电路均由PLC内部输出的24V直流电源供电。24V DC, 24伏直流电。
3.While wiring, the input line must be kept as far as possible away from the output line, the high-voltage line and the electric equipment to avoid any interference with the input.在布线过程中，输入线应尽可能远离输出线、高压线及用电设备，以防对输入造成干扰。
2) What does X in Figure 4-2-1 stand for?
3) What is the voltage with which the input circuits are supplied from inside the PLC?
4) Why must input line be kept away from output line as far as possible?
教法
讲授法、演示法、小组讨论法
课时
1课时大课（90分）
教具
projector
板
书
设
计
Lesson 2 The Input Circuit of PLC
1 How many input points and output points does the PLC in Figure 4-2-1 have?
3. The teacher explains the following:
1)terminal n.& adj端子,接线端，终点站;terminal lead
引线端子;terminal examination期末考试;terminal cancer晚期癌症
2)voltage电压,伏特数;voltage常常表示电压整体概念，应用中的伏数常用volt,或v表示。
2. The teacher asks four students to answer the following questions orally:
1) How many input points and output points does the PLC in Figure 4-2-1 have?
教学
难点
1. be supplied with
2. configuration
3. interference
4. component
5. the input terminals are indicated as X and they should be connected to a PLC’s external input components,…
10. external外部的
11. avoid避免
12.connect连接
13. caution注意，当心
Step III Text
1. Key words
2. Fast reading
3. Careful reading
4. Difficult Points
5. Reading Competition
6)avoid避免;后面接名词或动名词，e.g He crawled to the watchtower to avoid being seen.他匍匐爬向岗楼以免被看见。
4. Pair work: One student spells a word and his/her partner says the Chinese meaning and vice versa.
2 What does X in Figure 4-2-1 stand for?
3 What is the voltage with which the input circuits are supplied from inside the PLC?
4 Why must input line be kept away from output line as far as possible?
as far as possible尽可能的远
the output line, the high-voltage line和the electric equipment都是介词from的宾语。
▲Each group chooses one student to read the whole text, and each group chooses another student to grade their reading. The teacher also grades it. See who will get the best marks.
▲The students are asked to read the supplementary material after class.
▲1. The students are asked to read the text again and try to find the answers to the following questions.
1) How many input points and output points does the PLC in Figure 4-2-1 have?
2. The students read the dialogue by themselves.
3. The teacher asks four students to read the dialogue.
▲1. Exercises II and IV are their assignment to be done in the textbook in class.
2. Four students form a group and 1) discuss the whole text. 2) discuss the four questions above.
To cope with difficult points：
1. In Fig. 4-2-1, the input terminals are indicated as X and they should be connected to a PLC’s external input components, such as a sensor, a contractor or a switch.图4-2-1中,输入端子用X来表示，它们应与PLC的外部输入元件相连，如传感器、接触器和开关。
2. The students read the words after the teacher so that the students can pronounce each word correctly, especially long words, such as configuration, component, equipment, interference, etc.
▲ 1.The students are asked to read and write the key words.
2. The teacher asks one student to read any words from the key words and he/she asks anotherstudentto spell them.
6. Summary
Step IV Dialogue
Step V Exercises in Class
Step VI Supplement
Step VIIHomework
Step VIIIБайду номын сангаасelf-checklist
▲The students have a dictation of new words of Lesson One:
2) What does X in Figure 4-2-1 stand for?
3) What is the voltage with which the input circuits are supplied from inside the PLC?
4) Why must input line be kept away from output line as far as possible?
课题
Lesson 2 The Input Circuit of PLC（U4-L2）
授课
日期
年月第课时
教学
目标
知识目标：掌握全部生词；完全理解课文并掌握课文中英语句子的结构。
能力目表：学生能用英语表达课文的全部内容。
素质目标：通过学习本课，提高学生专业素质和英语素质。
教材
分析
本课生词不多，但有几个不太容易记忆的长单词；相对其他课文，本课文较长，但是句子结构不难，如果学生学过相应的专业知识，本课课文并不太难学。
3)interference干扰，动词是interfere
4)equipment设备;是一个不可数名词，一套设备，不可说an equipment,而是a set of equipment.
5)configuration外形，布局;这个单词长，应根据读音记忆，con-fi-gu-ration;或先记住单词figure,然后前面加con（con表示“全、共）,后面去掉e,加ation.
▲1. The teacher reads the whole text and the students are asked to think about it and get the general idea.
2. The teacher switches on the projector, reads the whole text with his/her teaching pointer pointing to the sentences he/she is reading..
Step II. Vocabulary study
1. terminal端子
2. voltage电压,伏特数
3.sensor传感器
4.interference干扰
5. component元件
6. equipment设备
7.configuration外形，布局
8.model样式,型,模型,
9. generally通常，一般地，概括地
教
学
后
记
教学内容
教学过程
Step 1 Lead-in and Warm-up
.1. Dictation.
2. Ask the students how much they know about input circuits.
Do they know the words“terminal, sensor, voltage, component”etc?
1. current 2. fuse 3. extension 4. supply 5. wiring 6. emergency 7. switch 8. direct
▲1. The students have previewed the new words of this lesson, so the teacher will ask one student to read them.
教学
重点
词汇：. voltage, equipment, avoid
句子：….the input terminals are indicated as X and they should be connected to a PLC’s external input components, such as….
▲The teacher gives a brief account of the text
▲1. Helen的第1句话“Tom, can you tell me what does I/O point mean?”的标准说法应当是“Tom, can you tell me what I/O point means?”
a PLC’s external input修饰components.
2.The input circuits are all supplied with 24V DCfrom inside thePLC.输入电路均由PLC内部输出的24V直流电源供电。24V DC, 24伏直流电。
3.While wiring, the input line must be kept as far as possible away from the output line, the high-voltage line and the electric equipment to avoid any interference with the input.在布线过程中，输入线应尽可能远离输出线、高压线及用电设备，以防对输入造成干扰。
2) What does X in Figure 4-2-1 stand for?
3) What is the voltage with which the input circuits are supplied from inside the PLC?
4) Why must input line be kept away from output line as far as possible?
教法
讲授法、演示法、小组讨论法
课时
1课时大课（90分）
教具
projector
板
书
设
计
Lesson 2 The Input Circuit of PLC
1 How many input points and output points does the PLC in Figure 4-2-1 have?
3. The teacher explains the following:
1)terminal n.& adj端子,接线端，终点站;terminal lead
引线端子;terminal examination期末考试;terminal cancer晚期癌症
2)voltage电压,伏特数;voltage常常表示电压整体概念，应用中的伏数常用volt,或v表示。
2. The teacher asks four students to answer the following questions orally:
1) How many input points and output points does the PLC in Figure 4-2-1 have?
教学
难点
1. be supplied with
2. configuration
3. interference
4. component
5. the input terminals are indicated as X and they should be connected to a PLC’s external input components,…
10. external外部的
11. avoid避免
12.connect连接
13. caution注意，当心
Step III Text
1. Key words
2. Fast reading
3. Careful reading
4. Difficult Points
5. Reading Competition
6)avoid避免;后面接名词或动名词，e.g He crawled to the watchtower to avoid being seen.他匍匐爬向岗楼以免被看见。
4. Pair work: One student spells a word and his/her partner says the Chinese meaning and vice versa.
2 What does X in Figure 4-2-1 stand for?
3 What is the voltage with which the input circuits are supplied from inside the PLC?
4 Why must input line be kept away from output line as far as possible?