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【简答题】
The sun is the closest star to Earth. Its ( ) gives Earth light.
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刷刷题刷刷变学霸
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【简答题】Mika is a ( ) . She started college when she was only 14 years old! Now she is an astronomer.
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【简答题】The famous astronomer Edwin Hubble ( ) in 1953. He was 63 years old.
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【单选题】What kind of scientist was Henrietta Leavitt?
A.
biologist
B.
chemist
C.
astronomer
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【单选题】What was her big discovery?
A.
the size of stars
B.
the brightness of stars
C.
the number of stars
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【单选题】How does Dr. Watkins describe Leavitt?
A.
hard working and smart
B.
sad and intelligent
C.
famous and hard working
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【简答题】1892 ( )
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【简答题】1868 ( )
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【单选题】What do we know now because of Leavitt’s work?
A.
All stars are really bright.
B.
The universe is really big.
C.
There are millions of stars.
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【简答题】1893 ( )
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【简答题】1912 ( )
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