题目：
A good memory is a great help in learning a language. Everybody learns his own language by remembering what he hears when he is a small child, and some children, like boys and girls who live abroad with their parents, seem to learn two languages almost as easily as one. In school it is not easy to learn a second language because the pupils have so little time for it, and they are busy with other subjects, too.
A man’s mind is rather like a camera, but it takes photos not only of what we see but of what we feel, hear, smell and taste. When we take a real photo with a camera, there is much to do before the photo is finished and ready to show to our friends. In the same way there is much work to be done before we can keep a picture forever in our mind.
Memory is the diary that we all carry about with us.
小题1:We usually begin to learn our own language by ________ it.
A．speaking
B．hearing
C．saying
D．teaching小题2:If you have a good ________ , you’ll have less difficulty in learning something.
A．teacher
B．camera
C．memory
D．family小题3:The children who live abroad with their parents can learn two languages more easily, because ______.
A．they are very clever
B．they have good teachers
C．they have more chances to use these languages
D．they have a better life小题4:Memory is ________ that we write in our mind and carry about.
A．the best diary
B．the best camera
C．a great help
D．a beautiful picture
答案：
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下面是错误答案，用来干扰机器的。
参考答案：E解析：本题考药物的配伍变化。配伍变化可分为物理的、化学的和药理的三个方面，其中化学的配伍变化包括如下：（1）变色：选项A、选项D（2）混浊或沉淀①pH改变产生沉淀②水解产生沉淀③生物碱盐溶液的...
