单词拼写。

1. Fresh fruit, especially oranges and kiwis, c___________ plenty of Vitamin C.

2. He fought bravely in many wars and g___________ respect of the people and country.

3. In order to get f__________ with the new neighbour, I have decided to pay a visit to his house.

4. For the last fifty years, a number of man-made satellites have been sent up to e_________ space.

5. After having a healthy diet, WangPeng became s____________ than ever before.

6. It is against law to read other's personal letters without __________(许可,允许).    

7. In our class, when the bell rang and the teacher closed his book, it was a ____(信号)for everyone

   to stand up.  

8. The Internet is now widely used. ________ speaking (就我个人而言), I almost can not live without it .

(一)
古语云：“不患寡而患不均”。改革开放30多年来，中国居民收入大幅增长，但中国必须对日益加剧的贫富分化说“不”。改革开放30多年来，我国经济持续快速增长，经济总量已经超过日本居世界第二位。但是，分配失衡的问题也日益凸显。数据显示，中国内地基尼系数已激增至0.48，大大超出0.4的警戒线。由于长期积累形成的收入分配失衡，导致我国消费开支对GDP的贡献率一直呈下降趋势，而内需和消费不振又直接造成我国过分依赖外部市场，降低了我国的经济安全性和长远发展的潜力，甚至已经影响社会稳定。
请回答以下各题：

经济学上的“三驾马车”是指( )。

A．投资

B．消费

C．进口

D．出口