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the electrical resistivity of a mercury wire disappears suddenly when it 4. _____
(cool) below a temperature of about 4 K (−269 °C); absolute zero is 0 K, the
temperature at which all matter 5. ____(lose) its disorder. He soon 6.
__________(discover) that a superconducting material can 7. ______ (return) to
the normal (i.e., no superconducting) state either by passing a sufficiently large
current through it or by applying a sufficiently strong magnetic field to it.
Give a talk about conductivity of materials. Use the questions and
answers for help. Pay attention to the use of passive verb forms in your text
Analyze the following question and write a paragraph (40-80 words)
based on it:
How important is it for an engineer to know
conductors, insulator and semiconductors?
PARAGRAPH
A paragraph is a piece of writing that consists of several related
sentences and deals with one supporting idea (the topic). The main function
of a paragraph is to develop, support or explain the topic.
Include a topic sentence, several body sentences and a concluding
sentence. Be able to use the following linking words
sequence
after, first, then, next, now, to begin with, finally
example
for example, for instance, such as, in this case
addition
in addition, moreover, furthermore, as well as
cause/ result/ effect
because
(of),
so,
accordingly,
thus,
consequently, hence, therefore, as, due to (the
fact that), owing to, since
contrast
on the other hand, however, nevertheless, in
comparison, unlike, although, but
comparison
also, similarly, likewise, whereas, too, in the
same way
conclusion
to sum up, thus, as a result, in conclusion, so, to
conclude
TEXT B. ELECTRIC CURRENT CONDUCTION
Read the text and choose from the list 1-9 the sentence, which best fits
each gap (A-H) in the article. There is one extra sentence, which you do not
need to use
