下列河流，哪对是没有联系的？（）A．澜沧江—湄公河 B．怒江一萨尔温江 C．元江—红

-- How are you getting along with your English study? Do you need my help?

---      __, but I think I can improve it by myself.

A．No, thanks

B．That’s OK

C．You are helpful

D．That’s very kind of you

暑期夏令营里来自中、英两国的小朋友面对下列题目各自有不同的麻烦，你来帮助他们写出合适的单词吧!

1. They are __________(搜查) the forest for the missing boy.

2. Daniel is the most ____________(勤勉的) boy.

3. Mr Green closed the door _________ and left, so nobody noticed him.

4. It is so dark at night that we cannot see ___________(任何人).

5. You can borrow books from the school library ,but you should _________them on time.

6. The bats(蝙蝠) always sleep in the __________and go out for food at night.

7. His grandfather _________(死) five years ago.

8. Would you like to __________ on the moon some day?

9. Look! A snake is moving towards us . It is very__________ .

10. When you leave , you should _________ to turn off the lights.

最小的正整数是：______．

经多轮试验及检验，从（）中选择典型可用的方法。

A.数学分析法

B.经验判断法

C.试验法

D.德尔菲法

房地产市场调研的一般内容有房地产（）调研。

A.市场环境

B.市场需求

C.市场供给

D.市场营销活动

E.市场周期