[单项选择]氨基糖苷类药物在体内分布浓度较高的部位是（）。
A. 细胞内液
B. 血液
C. 耳蜗内淋巴液
D. 脑脊液
E. 结核病灶的空洞中

{{B}}Exercising Your Memory{{/B}}
1 Aging does not mean a dramatic decline in memory power, unless you help it happen by letting your mind go.
2 That’s not to say that memory doesn’t change throughout life. Researchers divide memory into categories based on the length of time when memories are stored. One system divides it up as short-term (less than one minute; remembering a telephone number while you dial, for instance), long-term (over a period of years) and very long-term memory (over a lifetime).
3 Short-term memory isn’t mastered until about age 7, but after that you never lose it. Long-term memory, however, involves more effort and skill and changes more through life. It’s not until the early teens (十几岁) that most people develop a mature long-term memory.
4 First, we must get information into