问题
单项选择题
Dacron sails，when not in use，may be damaged if（）.
A.left in the sunlight
B.stowed wet
C.washed with soap
D.folded frequently
答案
参考答案：A
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Dacron sails，when not in use，may be damaged if（）.
A.left in the sunlight
B.stowed wet
C.washed with soap
D.folded frequently
参考答案：A