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题目内容
(国家开放大学国际航运英语与函电)
The cases should be ( ) they can easily be made tightly closed again after being opened.
A.as such so as
B.of such a type that
C.like this so that
D.of such a type which
A.as such so as
B.of such a type that
C.like this so that
D.of such a type which
参考答案