We can learn from the passage that those at the computer center in the middle of the night ale ______.

A．Most of them are top students majoring in computer programming.
B．For them, computer programming is the sole purpose for their life.
C．They can stay with the computer at the center for nearly three days on end.
D．Their "love" for the computer is so deep that they want to be near their machine when they sleep.

A．Scientists are better teachers financially supported by the state.
B．Science makes people of high class engaged in noble professions.
C．People of lower class are eager to get rid of the poison of blind belief.
D．Harmful ideas and behaviors are counterbalanced by scienc