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【单选题】
下列对Kwashiorkor和Marasinus两种PEM的描述正确的是( )A.
Kwashiorkor的典型症状是消瘦，Marasrnus的典型症状是水肿
B.
Kwashiorkor的发病原因主要是缺乏能量，而蛋白质供应充足
C.
Marasmus的发病原因主要是缺乏蛋白质，而能量供应充足
D.
Kwashiorkor的发病原因是由于能量摄入基本满足而蛋白质不足，Marasmus的发病原因是由于蛋白质和能量均摄入不足
E.
不存在又水肿又消瘦的PEM患者
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反馈参考答案：
举一反三
【简答题】为了使数字信号在基带传输时不出现码间干扰，当数字信号的传输速率越高，则要求信道的频带宽度越宽。()
【单选题】If a firm operating in monopolistic competition is producing a quantity that generates MC
A.
can be increased by increasing production.
B.
can be increased by decreasing production.
C.
can be increased by increasing the price.
D.
is maximized only if MC = P.
【单选题】If a firm operating in monopolistic competition is producing a quantity that generates MC = MR, then the marginal decision rule tells us that profit:
A.
is maximized.
B.
can be increased by decreasing production.
C.
can be increased by decreasing the price.
D.
is maximized only if MC = P.
【单选题】If a firm operating in monopolistic competition is producing a quantity at which MC
A.
increased; decreasing production
B.
increased; increasing production
C.
increased; increasing the price
D.
maximized; decreasing production
【单选题】If a firm is operating at theshutdown point, it is:
A.
just covering all costs.
B.
just covering all fixed costs.
C.
just covering all variable costs.
D.
operating at minimum averagetotal cost.
【简答题】汽车配件按照应用属性的不同, 可分为( )( )消耗件、维修件和( )。
【多选题】If a firm operating in the EU exploits user data without the proper consent, the punishment it may receive include ______.
A.
Up to 4 percent of the company's annual income.
B.
Up to 10 percent of the company’s annual income.
C.
€10 million
D.
€20 million
E.
There is no punishment.
【单选题】为了使数字信号在传输时不出现码间干扰，信道的频带宽度和数字信号的传输速率应该满足奈奎斯特第一准则，即()。
A.
数字信号的传输速率越低，要求信道的频带宽度越宽
B.
数字信号的传输速率越高，要求信道的频带宽度越窄
C.
数字信号的传输速率越高，要求信道的频带宽度越宽
D.
数字信号的传输速率对信道的频带宽度没有要求
【简答题】汽车配件按照应用的属性不同,可分为 、 、消耗件、维修件和肇事件。
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