单项选择题：（）是现代政府最为重要的宏观调控工具。A、税收 B、收费 C、罚款 D、指令

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我国目前在研的空间实验室采用两舱结构，分别为实验舱和资源舱。实验舱可保证舱压、温湿度、气体成分等航天员生存条件，可用于航天员驻留期间在轨工作和生活，密封的后锥段安装再生生保等设备。实验舱前端安装一个对接机构，以及交会对接测量和通信设备，用于支持与飞船实现交会对接。资源舱为轨道机动提供动力，为飞行提供能源。

建设实现空间站的关键技术是“空间交会对接”。两个或两个以上的航天器通过轨道参数的协调，在同一时间到达太空同一位置的过程称为交会。对接是在交会的基础上，通过专门的对接机构将两个航天器连接成一个整体。实现两个航天器在太空交会对接的系统，称为交会对接系统。

空间交会对接技术难度很大，因为空间实验室体积都比较大，发射空间实验室的时候是不装人的，人是后来通过航天飞机或者飞船送上去的。人要进入到空间实验室，航天飞机或飞船就必须和空间实验室对接起来。这个难度很大，在太空中的空间实验室和航天飞机都是高速运行的，时速到达28000公里以上，在对接过程中，如果计算不准，就可能发生飞船相撞事故。

空间交会对接控制方法有两种，一种是人工控制、另一种是自动控制。用人工控制来完成太空交会对接可以提高交会对接的成功率。自动控制交会对接可靠性高，不需考虑人员的安全和救生问题。在航天器的交会对接技术方面，未来的发展趋势是人工控制和自动控制相结合，以提高交会对接的灵活性、可靠性和成功率。

目前我国的火箭最大运载能力只有10吨，不仅无法将体积更大、重量更重的空间实验室发射升空，也满足不了空间实验室在运行期间所需大量物资的运输要求。在后续的发射中，将采用新一代大推力长征5号火箭。长征5号火箭的运载能力可达25吨，基本与国际上的顶级水平相当，可以满足在低轨道发射空间实验室的需要。　　

人类目前载人航天活动的终极目的，是将实验室搬上太空，利用太空微重力高真空的独特环境，开展地面无法进行的生命科学、材料科学等实验，从而为人类造福。　　

太空生命科学试验不仅可以进行植物育种、发明新的药物，而且在半导体、特种材料、天文学、对地观测等方面的好处更是不一而足。因此，以神七为起点的空间站建设，将为科学研究带来更大的舞台。　　

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Some people just can not decide what to do all by themselves. They often __1__ the advice (建议) of their friends. But they never do as their friends have said. My friend Jack is __2__ person, and he is always asking me for help. I try to help him as well as I can, but he never listens to me. Yesterday I __3__ a new way to make him take my advice. It worked. "Look," he said __4__ me a letter. "What do you think I should do? " The letter told him that there was a good job for him. It seemed to be a good chance (机会) for a young artist. His teacher __5__ him to Australia to work. The job would pay very __6__ , and he __7__ to travel and visit many interesting places. " __8__ this, Rose?" he asked, " If I take the job, I will have to stay in Australia for two years. I may stay a bit longer. But it would be a wonderful time for me. Should I go, Rose?" "Don't go," I told him, "You'll suffer (受苦) a lot there." "Don't go?" he __9__ surprised at my answer. As you have probably known, Jack went. I wonder (想知道) __10__ he found that I really wanted him to take the job.
( ) 1. A. ask for ( ) 2. A. such kind ( ) 3. A. thought ( ) 4. A. showing ( ) 5. A. will send ( ) 6. A. good ( ) 7. A. could be able ( ) 8. A. What do you like ( ) 9. A. asked ( ) 10. A. why	B. receive B. this kind B. tried B. showed B. send B. well B. could B. How do you like B. spoke B. whether	C. take C. such a C. gave C. to show C. would send C. nice C. would be able C. How do you think of C. said C. that	D. give D. a such D. wanted D. shown D. sends D. enough D. would be going D. What do you think D. looked D. when

（）是现代政府最为重要的宏观调控工具。A、税收 B、收费 C、罚款 D、指令

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