The strong, light-weight bamboo makes an excellent reinforcement for concrete.

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问题 The strong, light-weight bamboo makes an excellent reinforcement for concrete.

选项 A、replacement
B、enforcement
C、substitute
D、strengthening

答案D

解析句意：坚硬，轻巧的竹子极好地加固了混凝土。reinforcement与strengthening都是“加固”的意思。

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医学博士外语

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