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【单选题】
对巨幼细胞性贫血患者用VitB12治疗有效后,外周血中最先观察到的是A.
RBC升高
B.
Hb升高
C.
网织红细胞升高
D.
血小板升高
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举一反三
【简答题】当 时，分式值为0．当 ____时，分式 值为0．
【简答题】当= 时，分 式值为0．当 =____时，分 式 值为0．
【简答题】当a=______时，a+3没有倒数；当a______时， a+|a| a =0．
【单选题】What is the purpose of the interview?
A.
TO make Doctor Cole well-known.
B.
To do some research on space technology.
C.
To introduce a new telescope.
D.
To report what has been discussed at an astronomy meeting.
【单选题】What will the FDA do before announcing its final decision?______.
A.
They'll do more research.
B.
They'll consider public opinion.
C.
They'll ask experts for advice.
D.
They'll wait for government's decision.
【单选题】Which of the followingbest describes the purpose of a sound program of educational research?
A.
To develop teaching theories．
B.
To avoid the harm of competition with research．
C.
To develop teaching techniques．
D.
To help professors improve competencies．
【简答题】当x=（ ），分式 的值为0．
【简答题】如图，则当______时，得＞0．
【简答题】当（ ）时，分式 值为0．
【单选题】What does the word 'that' stand for in the second paragraph?
A.
Brain activity.
B.
Her research findings.
C.
The fact that cell phone use may cause cancer.
D.
Her research progress.
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