logo - 刷刷题
下载APP
【单选题】

Have you ever seen a horse with toes (脚趾) Millions of years ago, horses had many toes. They had four toes on each front foot. They had three toes on each back foot. The horses were no bigger than cats.
These small horses lived in the forest (森林). Their many toes helped the horses run over the soft (柔软的) , wet ground.
It was very hot in the forest. Bat the weather changed. It became cold (寒冷的,伤风). Many trees could not live in cold weather. The trees died and fell (落下;下降). Open fields took the place of forests. The sun made the ground dry and hard.
Horses began to change, too. They began to get bigger. This took a long time. On the dry, hard land, horses needed only their middle toes for running. Their middle toes became hard. After a long while, horses had only one hard toe on each foot.
Many, many years ago, horses had seven toes.

A.
Right
B.
Wrong
C.
Doesn’t say
题目标签:柔软森林下降
举报
参考答案:
参考解析:
.
刷刷题刷刷变学霸
举一反三

【多选题】布雷顿森林体系下的双挂钩包括( )

A.
美元与黄金挂钩
B.
各国政府或中央银行随时按官价向美国兑换黄金
C.
各国货币与美元挂钩
D.
各国货币与美元保持固定比价

【多选题】森林的作用主要有哪些?

A.
蓄水保土
B.
调节气候
C.
改善环境
D.
提供林产品