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．Limiting the amount of fish to be caught.B．Forbidding the killing of wild animals.C．Controlling land area.D．Protecting irrigation water.
A．Limiting the amount of fish to be caught.
B．Forbidding the killing of wild animals.
C．Controlling land area.
D．Protecting irrigation water.
单项选择题
Why was divorce unusual in ancient Egypt
A．Because the family bond is strong.
B．Because divorce cost a lot.
C．Because the man was allowed to many more than one wife according to law.
D．Because it was prohibited by law.
相关试题