中国大学MOOC: There are some invisible dead stars called black holes.
举一反三
- 中国大学MOOC:"Why do scientists know black holes exist?";
- 中国大学MOOC: As an important part of black culture, ________ in Invisible Man is the call of black tradition and is the narrator’s subconscious spiritual return.
- 中国大学MOOC:"You cannot imagine how fantastic the sky was with the stars __________ in the black velvet of the night. (twinkle)";
- 中国大学MOOC: The opening lines of Invisible Man introduce the protagonist, the invisible man and the theme of .
- 中国大学MOOC: The sky is clear; the stars are twinkling.