若正整数按如图所示的规律排列,则第8行第5列的数字是( )
A:64
B:56
C:58
D:60
-How heavily it is raining!
-What a pity! We have to __________ our sports meeting.
长乐的小玲要到福州西湖游览,她应查找( )
钾长石是常见的含铝矿物,其主要成分是KAlSi3O8,KAlSi3O8中硅元素的化合价为( )