Steinhardt said it is believed that following the Big Bang,the theoretical _7_ of the universe,dark matter caused particles to clump together.
2. A。 分析:空格所在的结构是插入语,是对前面的名词Big Bang进行说明/解释,因此根据Big Bang的含义(宇宙/创世大爆炸)判断A是答案。
8. A)universal B)additional C)fundamental D)structural
That set up the gravitation processes that led to the formation of stars and galaxies.Those stars,in turn,created the basic chemicals,such as carbon and iron, that were _8_ to the evolution of life.
3. C. 分析:借助空格所在的局部结构含义“例如对生命的演化来说。。的碳和铁”判断C(基本的/主要的)是答案。
9. A)many B)most C)little D)few
“Dark matter dominated the formation of structure in the early universe.”Steinhardt said.“For the first few billion years dark matter contained _9_ of the mass of the universe.
4. 分析:借助空格后的结构“宇宙的主体”判断空格处需要的是修饰不可数名词的修饰词,因此只有B和C合适。而前句说“黑色物质主宰。。”,空格所在的结构说“黑色物质包括。。”因此判断B((宇宙的主体的)大多数)是答案。
10. A)detection B)formation C)revolution D)separation
You can think of ordinary matter as a froth of an Ocean of dark matter.The dark matter clumps and the ordinary matter falls into it.That led to the _10_ of the stars and galaxies.”
10 B。 分析:借助空格前句句意“黑色物质聚集,普通的物质落在黑色物质上”,而空格所在的句子说“这就导致星星和星系的。。”,因此判断B(形成)合适。
11. A)would B)must C)shall D)should
Without dark matter, “there _11_ be virtually no structures in the universe.”
11 A。 分析:借助空格所在句子的大意“没有黑色的物质,在宇宙中实际上。。不会有组织”判断B合适(虚拟语气)。
12. A)unchecked B)unlocked C)unknown D)unmeasured
The nature of dark matter is _12_.
12. C。 分析:借助空格所在的句子的大意“黑色物质的性质是。。”判断C(未知的)合适。也可以借助后句的大意“它(黑色物质的性质)不能被看见或察觉。。”推断C是答案。