铝管是拉制而成的无缝管，它主要用来输送浓硝酸、（）、甲酸以及其他介质。
A.氯化钠
B.氢氧化钠
C.醋酸
D.氯化钙
参考答案：C
读小短文，然后做题。
There are many books on the shelves in my home. Some are my father's, and some are my mother's. And
some are mine. We all like books very much. We learn a lot from books. They tell us what is good and what is
bad. Sometimes I give some books to my classmates. They like to read them, too. We often say, " Books are
our good friends."
1. What're on the shelves? There are _____________ books.
2. Who do you sometimes give the books to? Sometimes I give books to my _____________.
3. Do your classmates like to read them? Yes, _____________ _____________.
4. What do we often say? We often say, " _____________ are our good _____________."
5. Whose books are they? They are _______________.
A. my father's
B. my mother's
C. mine
D. A, B and C
6. We can learn something new from _______________.
A. the books
B. my mother
C. my father
试从信息和交易成本两方面，简述如何提高我国银行业的竞争力。
