题目内容
Marie Curie also ________ the use of X-ray machines, ________ now widely used in hospitals.
A. pushed for, which is B. pushed out, which are
C. pushed for, which are D. pushed in, which is
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题目内容
Marie Curie also ________ the use of X-ray machines, ________ now widely used in hospitals.
A. pushed for, which is B. pushed out, which are
C. pushed for, which are D. pushed in, which is