25.Find more information about semiconductors and tell your group mates.
UNIT VI
INTRINSIC SEMICONDUCTORS |
Language Work
Past Simple Passive
Affirmative
I/he/she/it/we/you/they | was/were | tested |
For example:
· The Statue of Liberty was designed by a French engineer. =
= A French engineer designed the statue of Liberty.
· Copper was discovered long ago.
Negative
I/he/she/it/we/you/they | was not/were not | tested |
For example:
· Alex was not taught English at school.
Questions
Was/Were | I/he/she/it/we/you/they | tested? |
For example:
· Was the first robot designed in the 20th century?
Positive | Negative | Question |
The device was testedyesterday. | The device was not testedyesterday. | When was the device tested? |
Past Continuous Passive
Affirmative
I/he/she/it/we/you/they | was being/were being | tested |
For example:
· For a long time the electronic devices were being used for control.
· The bomb was being defused when it exploded.
Negative
I/he/she/it/we/you/they | was not being/were not being | tested |
1. Fill in the table.
Noun | Verb | Adjective | Adverb | Translation | Transcription |
concentrated | |||||
combine | |||||
creation | [kri′eISqn] (n) | ||||
lost | |||||
connection | |||||
function | |||||
cause | [kLz] (n,v) | ||||
equal | [Jkwql] (n,v,adj) | ||||
hole | |||||
intrinsic | |||||
leave | |||||
magnitude | |||||
mobility | mobile | ||||
pass | |||||
rate | |||||
receive | |||||
sufficient | |||||
total | |||||
point | |||||
available | |||||
reduce |
2. Read and translate the following international words:
|
|
Nouns (n): coefficient, concentration, diagonal, gramme, minute, position, symptom.
Adjectives (adj): absolute, original, physical.
Verb (v): consult.
3. Put in the missing words, using the words from the table above:
a. Steel is produced by … iron with semiconductors.
b. The … of greenhouse gases in atmosphere is high.
c. Greenhouse gases … with hydrocarbons to form smog.
d. We considered many problems … with semiconductors.
e. Recombination causes a continual … of holes and free electrons.
f. а) The alarm system was not … when the paintings were stolen.
g. Some people believe the universe was … by a big explosion.