题目内容
（请给出正确答案）
[主观题]
When most people refer to multimedia, they generally mean the combination of two or more c
ontinuous media, usually with some user(115). In practice, the two media are normally audio and video, this is,(116)plus moving(117).It should be' obvious by now that transmitting multimedia material in uncompressed form. is completely out of(118). The only hope is that massive compression is possible. Fortunately, a large body of research over the past few decades has led to many compression techniques and algorithms that make multimedia transmission(119).
A．display
B．games
C．help
D．interaction
E．pictures
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