题目

用have或has填空 (1) My friend a nice room. (2) Do you an interesting book? (3) Does she a tape player? (4) Wang Lin an English dictionary. (5) They some oranges. 答案:【1】has 【1】have 【1】have 【1】has 【1】have如图所示,PA⊥OA,PB⊥OB,垂足分别是A和B,点D是OP的中点,则DA与DB的长度关系是:______.
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