[单项选择]

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’
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.

[单项选择]

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’
A. With the help of PSAs, the ground crews and scientists can present in real time in the spacecraft.
B. With the help of PSAs, the ground crews and scientists can control the spacecraft as if they were there.
C. With the help of PSAs, the ground crews and scientists cannot in real time present in the spacecraft.
D. With the help of PSAs, the ground crews and scientists cannot advise the astronauts to deal with different situations.

[填空题]Twenty-four years and two days ago, on a Tuesday morning, the space shuttle Discovery (26) to low Earth orbit from Cape Canaveral, Florida. As NASA’s newest eye in the sky, the Hubble Space Telescope, is an (27) which can peer deep into the cosmos and capture the universe’s inhabitants in exquisite detail. It had taken (28) of design and planning to get the telescope ready for work. The next day, on April 25, astronauts delivered the telescope to space.
Then, scientists eagerly (29) Hubble to start revealing cosmic secrets. We all know what happened next. A flaw in the telescope’s (30) mirror meant the images weren’t sharp. (31) incredibly faint objects, such as very distant galaxies, wasn’t possible. It would be three years before the first of five servicing missions let astronauts correct the defect and (32) Hubble’s vision to what it should have been.
Since then, though, the Hubble space teles