单项选择题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______