A.

1.[c][u]英语字母表的第 1 个字母the first letter of the English alphabet

3.[c][u]（学业成绩）第一等，优，甲the highest mark/grade that a student can get for a piece of work or course of study

4.[u]（表示两个或更多可能性中的）第一个used to represent the first of two or more possibilities

5.[u]（代表一个假设的或不指名的人）甲used to represent a person, for example in an imagined situation or to hide their identity

from A to B

从一地到另一地from one place to another

from A to Z

从头到尾；彻底地；完全including everything there is to know about sth

1.A 级公路，干线公路（英国公路代号，后接数字）used in Britain before a number to refer to a particular important road

2.（除美国外，用于数字前表示标准纸张尺寸） A …号纸（尺寸）used (but not in the US) before numbers which show standard metric sizes of paper

1.(=about)

2.(=accepted)

3.(=acre)

4.(=acting)

5.(=active)

6.(=adjective)

7.(=after)

8.(=afternoon)

9.(=aged)

10.(=alto)

11.(=ampere)

12.(=anno)

13.(=answer)

14.(=ante)

15.(=approved)

16.(=absolute (temperature))

17.(=Academy)

18.(=Admiral)

19.(=adult)

20.(=America(n))

21.【化】(=argon)氩

22.【物】(=angstrom (unit))埃

1.(=about)

2.(=accepted)

3.(=acre)

4.(=acting)

5.(=active)

6.(=adjective)

7.(=after)

8.(=afternoon)

9.(=aged)

10.(=alto)

11.(=ampere)

12.(=anno)

13.(=answer)

14.(=ante)

15.(=approved)

16.(=absolute (temperature))

17.(=Academy)

18.(=Admiral)

19.(=adult)

20.(=America(n))

21.[Chemistry](=argon)

22.[Physics](=angstrom (unit))

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