正常龈沟深度() A.2~3mm B.≤0.5mm C.≤2mm D.≤ 发布时间:2017-09-12 07:02 │ 来源:www.tikuol.com 题型:单项选择题 问题: 正常龈沟深度()A.2~3mm B.≤0.5mm C.≤2mm D.≤1mm E.≤3mm
题型:单项选择题 He failed in his business a third time and only then ______ the difficult situation he was in. A.I realizedB.I had realizedC.had I realizedD.did I realize 查看答案
题型:单项选择题 —There is still a copy of the book in the library.Will you go and borrow_____?—No,I’d rather buy_____in the bookstore.A.it;oneB.one;oneC.one;itD.it;it 查看答案