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【单选题】
(76).下列哪一项是引起巨幼细胞性贫血的原因A.
红细胞本身缺陷
B.
慢性失血
C.
骨髓造血功能受损
D.
缺乏叶酸、维生素B12
E.
脾功能亢进
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反馈参考答案：
举一反三
【简答题】I have a full-time job but I like learning _______ in my spare time.
【简答题】The conference ________ a full week by the time it ends. A) must have lasted B) will have lasted C) would last D) has lasted
【单选题】I have a full-time job but I like learning __________ in my spare time.
A.
new things
B.
old things
【单选题】The conference ______ a full week by the time it ends.
A.
must have lasted
B.
will have lasted
C.
would last
D.
has lasted
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