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Going to a British high school for one year was a very enjoyable and exciting _______ (经历) for one.
1年前
一列横波在x轴上传播,图1甲为t=0时的波动图象,图1乙为介质中质点P的振动图象.该波的波长为________m,频率为________Hz,波速为________m/s,传播方向为________.
1年前
用two of nice photos are here family his连词成句
1年前
用括号内动词的适当形式填空 Fish _____ (die) without water.
1年前
1年前