庆大霉素的适应证除外
A.支气管肺炎B.脑膜炎C.结核病D.烧伤感染E.细菌性痢疾
参考答案:C
______ on ten years of observation and study, the theory shows that every one dreams every night, whether they realized it or not.
A.Basing
B.Based
C.Being based
D.Having based
(6分)(1)某元素最高化合价为+5,原子最外层电子数为2,半径是同族中最小的,其核外电子排布式为 ;
(2)某元素原子的价电子构型为4S24p1,它属于第 周期, 族,元素符号是 。
(3)原子序数为24的元素原子中有 个电子层, 个能级。