问题
选择题
a、b、c、d、e五种物质均含有一种相同的元素，在一定条件下可发生如图所示转化，其中a是单质，b在通常状况下是气体，c、d都是氧化物，e是该元素的最高价氧化物对应水化物，且是一种强电解质，则a可能是
A．C12
B．N2
C．S
D．C
答案
BC
；
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a、b、c、d、e五种物质均含有一种相同的元素，在一定条件下可发生如图所示转化，其中a是单质，b在通常状况下是气体，c、d都是氧化物，e是该元素的最高价氧化物对应水化物，且是一种强电解质，则a可能是
A．C12
B．N2
C．S
D．C
BC
；
Do you know S. H. E? It is a group Taiwan, China. There are lovely girls in it. They Selina, Hebe and Ella. They are very popular. Lots of girls like Selina because she is very . She has long straight hair. She is of medium and thin. Ella is cool! She looks a boy. She is of medium height and a little heavy. She always short, straight hair and a jacket. Many fans think she sings very well. Hebe is a nice girl. She isn’t tall and she is of medium build. She has long, straight hair, too.
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