科学家在利用无土栽培法培养一些名贵花卉时,培养液中添加了多种必需化学元素。其配方如下: 离 子K+Na+Mg2+Ca2+NO3-H2PO4-SO42-Zn2+ 培养液浓度/mol·L-1110.251210.251 其中花卉根细胞吸收最少的离子是( ) A.Ca2+ B.SO42- C.Zn2+ D.H2PO4- 答案:C________ my daughter, Yang Qing is, she can speak rather fluent English.
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A.As little
B.Little although
C.Little as
D.Little even though