单项选择题

A．It affects the growth of trees.
B．It has been increasing since the Ice Age.
C．It is determined by the chemicals in the air.
D．It follows a certain cycle.
<上一题 目录 下一题>
热门 试题

单项选择题
A．She thanks the man for his offer.B．She thanks the man and accepts his offer.C．She is not pleased with the man’’s offer.D．She thanks the man but declines his offer.
A．She thanks the man for his offer.
B．She thanks the man and accepts his offer.
C．She is not pleased with the man’’s offer.
D．She thanks the man but declines his offer.
单项选择题
A．1B．3C．6D．10
A．1
B．3
C．6
D．10
相关试题