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【单选题】
由于应用甲氨蝶呤、甲氧苄啶等引起的巨幼红细胞性贫血宜选用下列何药治疗:A.
叶酸
B.
铁剂
C.
维生素C
D.
维生素B12
E.
甲酰四氢叶酸钙
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【简答题】通过抑制胆碱酯酶，产生拟胆碱活性的药物是
【单选题】We learn from the passage that people classify a person into certain type according to ______.
A.
his way of acting and thinking
B.
his way of speaking and behaving
C.
his learning and behavior
D.
his physical appearance and his personality
【简答题】通过抑制胆碱酯酶，产生拟胆碱活性的药物是 查看材料
【单选题】It may be inferred that the author would classify which of the following modes of behavior. as a referential symbol that originally derived from a condensation symbol?
A.
Vocalizing inarticulately in order to express rage without using words
B.
Writing a pictographic character that vaguely resembles a physical object
C.
Flag signaling where the flag movement relies on an existing arbitrary code
D.
The use of right-lane highways by general agreement
E.
Genuflection to indicate one's willingness to serve in a situation
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