In the sentence "Visitors approach the museum through a glass atrium, open an enormous door, enter a cave" ( paragraph 6 ), the word "atrium" has the Chinese meaning of ______.

单项选择题According to one expert, MIDI ______.

单项选择题Martin Goldsmith believes that computer music has not yet been widely accepted because ______.

单项选择题Machover's experiments on digital music are for the following purposes EXCET ______.

单项选择题The author thinks that if the Bill becomes law, its effect would be______

单项选择题By quoting the growing percentage points of the aged in the population, the author seems to imply that______.