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I was doing my homework while my parents were ______ (cook)dinner.
1年前
小坤准备去实地考察我国境内已确定的最早人类遗址。他应该去 [ ]
1年前
If it were not for the fact that I _____ very busy,I would go with you. [ ]
1年前
如图,E,F分别是边长为6的正方形ABCD的边CD,AD上两点,且CE=DF,连接CF,BE交于点M
1年前
鲜卑族建立的前秦和氐族建立的北魏都曾统一过黄河流域。 错误:___________________ 改正:___________________
1年前