某一个体其体细胞中染色体数目比二倍体多了一条称（）
A.亚二倍体
B.超二倍体
C.多倍体
D.嵌合体
E.亚三倍体
参考答案：B
When asked about the secret about staying young, he said that a balanced diet __________ with exercise was the recipe for a healthy life.
A． conducted
B． concluded
C． combined
D．connected
凡具有（）的物质，称为离子交换剂。
