21. (Error Correction )This is particularly true of(A ) libraries and archives which(B ) valuable information is stored in a manner that takes up vast amounts of(C ) space, is prone to(D ) decay, and may not be easily accessible.

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統計： A(23), B(104), C(36), D(46), E(0) #571434

詳解 (共 5 筆)

#1077549
where
5
0
#5779244
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2
0
#1025057
where?
1
0
#991548
B 要怎麼改才正確呢？
1
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#5746573
whose
0
0