2. 外语
  3. Eta Carinae is now engaging in Eta Carinae is hard to observe because

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

admin2009-06-15  39
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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