题目
A.replaced in its proper location if weight loss is no more than 15%
B.replaced in its proper location if weight loss is no more than 25%
C.labeled empty and recharged as soon as possible
D.labeled empty and replaced in its proper location regardless of weight
第2题
第4题
第6题
A.Type 2
B. Type 3
C. Type 4
D. Type 5
E. Type 9
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