单选题Directions:his task is the same as Task 1. The 5 questions
or unfinished statements are numbered 41 to 45.
In about two years, NASA astronauts will go into space with personal
assistants, robotic assistants, of course. About the size of softballs, these
personal satellite assistants (PSAs) can float throughout the space shuttle or
space station, automatically monitoring life support systems, snapping photos,
and taking over monitoring tasks from failed sensors. They' re equipped with
collision avoidance system so they won't bump into anything: Naturally, they' re
wireless. Thanks to their videoconferencing capabilities, the PSAs offer a
virtual presence for ground crews and scientists, letting them advise
astronauts—in real time—in the midst of their experiments. The PSAs will be
stowed until the spacecraft reaches orbit (天体运行的轨道). And then activated by the
astronauts, ground crews, or even by the spacecraft itself or other PSAs
requesting help, they can work automatically or respond to voice or radio
commands, and can exchange information with the spacecraft' s main
computers. Floating through the spacecraft, the little robots
will measure gas levels, temperature, and atmosphere pressure—making them ideal
for checking alarms and dangerous areas, such as the compartment that caught
fire on the Mir space station. And, if "smart" identification tags are added to
inventory items like food pouches and experiment samples, project manager Yuri
Gawdiak of NASA' s Ames Research Center says PSAs could track
inventories. One of their biggest benefits may be size. By
squeezing into hard-to-reach spaces of the shuttle or space station, PSAs can go
where no man has gone since the vehicles were first assembled—simply because man
doesn't fit.
单选题
Which of the following statements is NOT true according to the passage?
A. With the help of PSAs, NASA astronauts can deal with many affairs in the
space shuttle or space station more easily.
B. PSAs are mechanical devices which can float all over the space station
without any collision.
C. PSAs works only under the voice or radio commands of astronauts.
D. PSAs can track inventories if "smart" identification tags are added to
inventory items.