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She was ________ an e-mail from her friend the whole morning, but it didn’t come.
1年前
_________ (游泳) for some time after a tiring day is very enjoyable and exciting for me in summer.
1年前
请从括号里所给的三个词语中,选出一个最符合语境的词语填写在横线上。
1年前
Jeans have become one piece of clothing worn by the most people in the world.
1年前
一种电子计算机每秒可做4×10的9次方次运算,它工作5×十的二次方s可做多少次运算?
1年前