皮皮学，免费搜题
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【单选题】
下列各组顺序，正确的是 （ ）A.
微粒半径大小：S 2 － ＞Cl － ＞F － ＞Na + ＞Al 3+
B.
热稳定性大小：SiH 4 ＞PH 3 ＞NH 3 ＞H 2 O
C.
沸点高低：HF＞H 2 O＞NH 3
D.
等物质的量浓度溶液，酸性强弱顺序： H 2 SO 4 ＞H 3 PO 4 ＞H 2 SiO 3 ＞HNO 2
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参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】质粒是细菌细胞中自然存在于染色体外可以( )复制的一段( )状的( )链DNA分子。
【单选题】下列表现,中符合溶血性黄疸临床表现特点的是。
A.
皮肤黏膜呈浅黄色至深金黄色
B.
伴有皮肤瘙痒。
C.
粪便成白陶土色。
D.
尿结合胆红素定性试验阴性。
E.
尿液颜色正常
【单选题】There is sometimes a last security check just before the plane ________.
A.
gets off
B.
takes off
C.
gets on
D.
lands
【简答题】阅读理解 Near my home, there is a shop. It's not big. I can buy lots of things there. Sometimes(有时) I buy school things, like exercise-books, erasers, rulers, pens and color pencils in it. They are very c...
【简答题】There is sometimes a last security check just before the plane _______.
【简答题】阅读理解。 Near my home, there is a shop. It's not big. I can buy lots of things there. Sometimes (有时) I buy school things, like exercise-books, erasers, rulers, pens and color pencils in it. They are very...
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