()的大地构造演化和沉积发育是()和古生代的过渡阶段。
参考答案:震旦纪;前古生代
Find out the mistakes and correct them. 找出错误并改正。
( ) 1. Do you like to see the clouds in the sky?
A B C
( ) 2. Your kite look like a circle.
( ) 3. I usually wear short in summer.
( ) 4. Look to the sky, there are some clouds.
( ) 5. I like play on the beach.
大容积的有效圈闭