Eta Carinae is now engaging in Eta Carinae is hard to observe because

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问题 Eta Carinae is now engaging in
Eta Carinae is hard to observe because

选项 A、it is too far away.
B、there is too much dust and gas around it.
C、the binoculars are not powerful enough.
D、it does not send out infrared light.

答案B

解析

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职称英语理工类C级

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