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【单选题】
叶酸用于治疗恶性贫血必须哪个药物( )A.
硫酸亚铁
B.
维生素b12
C.
华法林
D.
肝素
E.
维生素K
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反馈参考答案：
举一反三
【单选题】What's the recession's impact on higher education?
A.
Universities receive fewer contributions from individuals.
B.
Tuitions have been rising twice the rate of inflation.
C.
The scholarship grants or loans increase to match the hike.
D.
More and more scholarships are based on need rather than scores.
【单选题】德国哲学家海德格尔十分赞赏诗人荷尔德林“人诗意地栖居在大地上”一语，从中可以看出在海德格尔和荷尔德林看来， 我们应怎样面对人生?
A.
珍惜光阴
B.
寻觅诗意
C.
赤子之心
D.
热爱自然
【单选题】What does the passage say about open educational resources?
A.
They contribute to teaching as much as to learning.
B.
They don’t profit as much as traditional textbooks do.
C.
They can't connect professors and students as textbooks do.
D.
They compete fiercely for customers with textbook producers.
【单选题】There’s a feeling in me_____we’ll never know what a UFO is—not ever.
A.
that
B.
which
C.
of which
D.
what
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