Things like electronics, glass or other objects are often packed with an appropriate protective material to prevent damage.
A. flexible
B. concrete
C. abnormal
D. fragile
网友回答
A. flexible
B. concrete
C. abnormal
(答案→)D. fragile
解析：形容词辨析。A灵活的；B具体的，有形的；C不正常的；D易碎的；句意:像电器用品，玻璃或者其它的易碎的物品经常用一些保护的材料来包装。根据句意说明D正确。