可知
Why does the author say that even gold and silver were inconvenient if you had to buy something expensive?
Why does the author say that even gold and silver were inconvenient if you had to buy something expensive?
Why, according to the passage, did ancient Chinese coins have a square hole in the center?
Why, according to the passage, did ancient Chinese coins have a square hole in the center?
When many American parents don’t know how to deal with their children they seek advice from the following EXCEPT_____.
When many American parents don’t know how to deal with their children they seek advice from the following EXCEPT\_\_\_\__.
As children enter adolescents, they begin to do the following EXCEPT _____.
As children enter adolescents, they begin to do the following EXCEPT \_\_\_\__.
The author believes that _____.
The author believes that \_\_\_\__.
配平：____+____=____+____+____在以上氧化还原反应中，被氧化与被还原的硫原子数之比为____．
配平：\_\_\_\_+\_\_\_\_=\_\_\_\_+\_\_\_\_+\_\_\_\_在以上氧化还原反应中，被氧化与被还原的硫原子数之比为\_\_\_\_．
Walking down the street the other day, _____.
Walking down the street the other day, \_\_\_\__.