What do the astronomers in Holland believe? What phenomenon cannot the astronomers find a satisfactory explanation for?

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问题 What do the astronomers in Holland believe?
What phenomenon cannot the astronomers find a satisfactory explanation for?

选项 A、The supernova destroyed its hydrogen layers at an earlier stage.
B、The supernova debris contained much hydrogen.
C、The supernova resulted in a quark star.
D、The explosion of the supernova has produced very much antimatter.

答案B

解析

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本试题收录于：公共英语五级笔试题库公共英语（PETS）分类

公共英语五级笔试

公共英语（PETS）

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What do the astronomers in Holland believe? What phenomenon cannot the astronomers find a satisfactory explanation for?

公共英语五级笔试

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