①外交政策坚持独立自主的基本立场

②维护世界和平，促进共同发展的基本目标

③一贯遵循联合国的宗旨和原则     

④和平共处五项原则得到了世界各国的认同

合作小组讨论“生命基本特征”时，出现下面4种说法，其中正确的是（  ）

根据句子意思，用括号中所给汉语提示或英语单词的适当形式填空。(每空一词)
①The____  of this mountain is 5540 meters. (高度)
②If you want to come, please let us know as soon as ____ (可能的).
③There are ____ of people by the sea. (千)
④The more careful you are, the fewer ____  you'll make. (错误)
⑤Mum is always busy. Last week she ____  three meetings. (出席)
⑥This piece of advice is very____ . I'll take it. (use).
⑦Bad weather sometimes causes____  (nature) disasters.
⑧____ , I could get the last plane ticket to the USA. (luck)
⑨The twin brothers like keeping secrets to ____ . (they)
⑩The radio says it will be much____ (rain) tomorrow.

如图为实验室常用的气垫导轨验证动量守恒的装置．两带有等宽遮光条的滑块A和B，质量分别为m_A、m_B，在A、B间用细线水平压住一轻弹簧，将其置于气垫导轨上，调节导轨使其能实现自由静止，这是表明____，烧断细线，滑块A、B被弹簧弹开，光电门C、D记录下两遮光条通过的时间分别为t_A和t_B，若有关系式____，则说明该实验动量守恒．