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【多选题】
关于尿液标本防腐的叙述，正确的是（）A.
冷藏可以防腐
B.
麝香草酚对结核杆菌的保存较佳
C.
5－羟色胺测定常使用冰乙酸防腐
D.
尿糖、尿蛋白测定推荐使用甲苯
E.
测定尿17－酮推荐使用甲醛
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【单选题】When Jimmy said that he would invite us all to the party, I think that he ___________ polite.
A.
has only been
B.
is only
C.
was only being
D.
was only
【简答题】It was Jimmy's birthday,and he was five years old.He got quite a lot of nice 1 presents from his family,and one of them was a beautiful big 2 . "Who gave him that thing?" Jimmy's father said when he s...
【简答题】闭式硬齿面齿轮传动的主要失效形式是
【简答题】二胡曲《二泉映月》是 最具有代表性的作品。
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