单项选择题

The two main requirements of aircraft design are______.

A．speed and cost
B．reliability and passenger comfort
C．lightness and dependability
D．ability to stay up in the air and reliability
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单项选择题
All equipment in an aircraft must______.
A．be tested to destruction
B．not be too light in weight
C．work especially well at high temperatures
D．work perfectly within a wide range of temperatures
单项选择题
According to the passage, which of the following statements is TRUE about the jury
A．The jury sent Jim to prison for a long time.
B．The jury visited Jim in prison.
C．There were eleven people on the jury.
D．There were twelve people on the jury.
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