Without dark matter, there would be virtually no structures in the universe.
The nature of dark matter is It cannot be seen or detected directly astronomers know it is there because of its on celestialobjects that can be seen and measured.
But the most dominating force of all in the universe is called dark energy, a recently power that astronomers say is causing the galaxies in the universe to separate at a faster and faster speed.
51 A worry B move C puzzle D reject
52 A understanding B value C pattern D structure
53 A changed B described C designed D shaped
54 A in B for C of D to
55 A make B keep C set D get
56 A written B called C identified D seen
57 A signed B stressed C acted D played
58 A believe B owe C feel D regard
59 A appeared B carried C published D contributed
60 A element B shape C formation D power
61 A with B as C form D beside
62 A turned B worked C led D attempted
63 A unknow B interesting C different D visible
64 A form B outcome C effect D source
65 A seized B proven C caught D grasped
答案:
51 C puzzle:使感到迷惑。几个选项中只有此选项意思符合原文。
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