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【单选题】
营养性缺铁性贫血的临床表现，错误的是？A.
注意力不集中，记忆力减退
B.
食欲减退，可出现异食癖
C.
年长儿可有头晕、眼前发黑、耳鸣等
D.
年龄愈大，肝脾肿大越明显
E.
免疫功能低下，易合并感染
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举一反三
【单选题】If the man crouches , he will find the earring he is looking for.
A.
stands on tiptoe
B.
bends his head
C.
looks down
D.
stoops low
【单选题】I know you are very busy at the beginning of the term. I really appreciate your help,and want to tell you that your help has encouraged me to work hard. What may these sentences be excerpted from?
A.
A letter of recommendation
B.
A letter of thanks.
C.
A letter of invitation
D.
A letter of asking for help.
【单选题】I know you are very busy at the beginning of the term. I really appreciate your help. Your invaluable advice and patient reply help me successfully accomplished my research. This excerpt is a(n) _____...
A.
complaint letter
B.
introduction letter
C.
thanks letter
D.
notice
【简答题】一年以内的生产能力计划称为中短期计划,它的最大特点是当年的可动用固定资产数量是 的。
【简答题】加密和解密属于OSI参考模型中(__)层的功能;实现数据交换的功能是(__)层。
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