什么叫杏仁体和晶腺?
参考答案:
矿物溶液或胶体溶液通过岩石气孔或空洞时,常常从洞壁向中心层层沉演,最后把孔洞填充起来,其小于2cm者通称杏仁体;大于2cm者可称晶腺。
Mrs. White found her husband surrounded by letters and papers and _____ very worried. [ ]
A. look
B. looks
C. looking
D. to look
1,3,8,16,27,( )
A.39
B.41
C.43
D.45