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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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参考解析：
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举一反三
【单选题】Leavitt got a job at _____.
A.
Yale University
B.
the University of Massachusetts
C.
the University of California
D.
Harvard University
【单选题】Leavitt went to school at ____.
A.
Radcliffe College
B.
the University of Massachusetts
C.
the University of California
D.
Harvard University
【单选题】Leavitt studied _____ of stars.
A.
the distance
B.
the brightness
C.
the size
D.
the length