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【单选题】
CD3和CD4抗原共同存在于A.
Th1和Tc细胞
B.
Th1和Th2细胞
C.
所有成熟T细胞
D.
NK细胞
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反馈参考答案：
举一反三
【简答题】CRM的营销核心是( )
【简答题】依据《环境影响评价法》，建设项目环境影响评价文件，由（ ）按照国务院的规定报有审批权的环境保护行政主管部门审批。
【单选题】The Taylor rule
A.
focuses on only fluctuations in real GDP.
B.
ignores price level stability to focus on responding to fluctuations in real GDP.
C.
is the rule actually followed by the Fed.
D.
shows how the Fed could set the federal funds rate.
【单选题】一台三相笼型感应电动机，额定电压为380V，定子绕组△接法，直接起动电流为I st ，若将电动机定子绕组改为Y接法，加线电压为220V的对称三相电流直接起动，此时的起动电流为I" st 与I st 相比的变化为______。
A.
变小
B.
不变
C.
变大
D.
无法判断
【单选题】The payback period rule
A.
varies the cut-off point with the interest rate.
B.
determines a cut-off point so that all projects accepted by the NPV rule will be accepted by the payback period rule.
C.
requires an arbitrary choice of a cut-off point.
D.
varies the cut-off point with the interest rate and requires an arbitrary choice of a cut-off point.
【单选题】Rule utiltarians think that
A.
everyone should act only on universal exceptionless rules.
B.
everyone should act only according to the rule “the end does not justify the means.”
C.
everyone should act according to the rule that brings about the most good for all.
D.
everyone should act according to the rule that is in their self-interest.
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