49/800 , 47/400 , 9/40 , (  )A.13/200

地球上两个最大的碳储存库为岩石圈和（  ）。

提示: Jane和 Michael商量周六去野餐。他们讨论要去什么地方，带些什么。 Michael建议邀请 John 和他的女朋友参加。最后他们决定星期六...

[完型填空]Glasses protect people's eyes from bright light. Microscopes make tiny...

[阅读理解]    Three men traveling on a train began a conversation about the wor...

What makes a person a scientist? Does he have ways or tools of learning that ...

Three men traveling on a train began a conversation about the world's greate...

To mark students' test papers, a checking machine is used.

He has been learning English for years.

I'll write to you as soon as I get there.

Riding bicycles can save energy.

The teacher told the students to sit down quietly.

I'm not an English major student.

I've changed my mind.

Visitors who come here like the beach and sunshine.

Either you must improve your work, or I shall dismiss you.

Do you go swimming every day?

How long has she lived there?

Instructions: 建议你在30分钟内，根据下面所给的题目和提纲用英语写出一篇不少于80词的短文。1.介绍家庭主要成员；2.描述令你难忘的...

Instructions: 建议你在30分钟内，根据下面所给的题目和提纲用英语写出一篇不少于80词的短文。1.你对压力的看法；2.阐述你的理由。...