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【单选题】
贫血是尿毒症必有症状,引起贫血的原因哪重要的A.
毒素使红细胞寿命缩短
B.
铁、叶酸缺乏
C.
严重呕血、便血
D.
EPO生成减少
E.
代谢产物抑制骨髓造血
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反馈参考答案：
举一反三
【单选题】According to the last paragraph, which of the following is true?
A.
Tutors will make a survey of the participants.
B.
The participants will finish a survey as a course project.
C.
The number of participants is restricted.
D.
Effective managers will present lectures for participants.
【简答题】After she finished __________(write) the article, she went to the post office to send it away.
【简答题】I went to a local post office to send a gift to Florida yesterday afternoon. When I __1 _ the door, there were many people waiting there. A bit 2 , I decided to calmly wait for my turn to place the p...
【单选题】已知 RLC 串联电路中, R=16 Ω ,X L =4 Ω, X c =16 Ω , 则电路的总阻抗为()。
A.
36 Ω
B.
16-j12 Ω
C.
16+j20 Ω
D.
16+j12 Ω
【简答题】设f(x，y)为连续函数，且对任意平面曲线C，都有 ，试证f(x，y)=0
【单选题】________是Windows7中的高级视觉效果,其特点是具有透明的磨砂玻璃效果、精致的窗口动画和新窗口颜色。
A.
个性化
B.
桌面背景
C.
小工具
D.
Aero效果
【简答题】设f(x)为连续函数，且对一切A＞0， 收敛,证明：对任意b＞a＞0有
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