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.
Olympic Games, international sports competition, held every four years at a different site, in which athletes from different nations compete against each other in a variety of sports. There are two types of Olympics, the Summer Olympics and the Winter Olympics. Through 1992 they were held in the same year, but beginning in 1994 they were rescheduled so that they are held in alternate even-numbered years. For example, the Winter Olympics were held in 1994 and the Summer Olympics in 1996. The Winter Olympics were next held in 1998. and the Summer Olympics will next occur in 2000.
The Olympic Games began in Athens, Greece, in 1896. The program for the 1896 Games, comprising only summer events (the Winter Olympics were not established until 1924). included about 300 athletes from fewer than 15 countries competing in 43 events in nine different sports. In contrast, the program 100 years later for the 1996 Summer Olympics in Atlanta. Georgia, included more than 10,000 a
A. the Winter Olympics were held in i994 and the Summer Olympics in 1996
B. the Winter Olympics will be next held in 2002, and the Summer Olympics will next occur in 2004
C. the first IOＣ members were all from Europe or the Americas
D. if IOＣ members were elected before 1966, they can serve for life
我来回答:
