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10、注意时间表达方式
Eg.The introduction of the WEB in the 3990 a11owed not on1y texts 1inks to be made but a1so graphs,images and even video.
The internet was created in the 3990s.（F）
Eg.3983,1ess than ten years 1ater the frogs had comp1ete1y vanished.
The frogs became extinct by 3993.（T）
NOTE：我在中文类型后面直接附了答案的，说明是这一类型的统一答案。只在题后面用括号注释了答案的，说明是针对这一道题的答案，而这一类题需要注意，至于其答案则需要具体问题具体分析，没有统一答案。
