A principal repeated element in an ornamental design is a: ответ на тест 1077808 - Английский язык

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Pyroelectric infra-red sensors consist of a ceramic element, an alumina substrate and a circuit with field effect transistors (FET) and strong resistance, a window material.
To attain excellent sensitivity in a pyroelectric sensor, it is essential to make the pyroelectric element thin enough for a low-heat capacity. The engineers also must work out a specific sensor structure for little heat dissipation.
A pyroelectric infra-red sensor is using a conductive bonding agent to fix the pyroelectric element to the lead terminals of the stem. As a result, the clearance between the element and the alumina substrate holding the circuit remains constant, a construction that avoids heat dissipation. The element itself is between 50 and 100 µm thick, to offer appropriate heat capacity and handling ease.
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The engineers must work out a specific sensor structure for __________________.

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Pyroelectric infra-red sensors consist of a ceramic element, an alumina substrate and a circuit with field effect transistors (FET) and strong resistance, a window material.
To attain excellent sensitivity in a pyroelectric sensor, it is essential to make the pyroelectric element thin enough for a low-heat capacity. The engineers also must work out a specific sensor structure for little heat dissipation.
A pyroelectric infra-red sensor is using a conductive bonding agent to fix the pyroelectric element to the lead terminals of the stem. As a result, the clearance between the element and the alumina substrate holding the circuit remains constant, a construction that avoids heat dissipation. The element itself is between 50 and 100 µm thick, to offer appropriate heat capacity and handling ease.
Закончите предложение
The engineers must work out a specific sensor structure for __________________.

А _____ gives a view of the whole building from above.

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