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【单选题】
社会保障制度中最核心的部分是( )。A.
社会保险
B.
社会福利
C.
社会救助
D.
社会优抚
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反馈参考答案：
举一反三
【单选题】某直流电动机铭牌值:UN=20V,nN=1000r/min,IN=40A,电枢电路电阻Ra=0.50Ω,若电枢回路不串启动电阻在额定电压下直接启动,则启动电流为_______。
A.
480A
B.
440A
C.
5~7倍的额定电流
D.
80A
【单选题】The consumer price index (CPI) and the producer price index (PPI) differ from each other since
A.
The PPI includes import goods but the CPI doesn't.
B.
The CPI usually rises sooner than the PPI.
C.
The composition of their market baskets is different.
D.
The PPI does not measure price increases of a fixed market basket.
【单选题】Again and again the doctor ______the crying girl, but he couldn’t find what was wrong with her.
A.
looked over
B.
looked after
C.
looked for
D.
looked out
【单选题】The doctor ____ the old woman carefully and found something wrong with her eyes. [ ]
A.
looked at
B.
looked up
C.
looked over
D.
looked for
【简答题】变速器是由不同 的齿轮啮合,将发动机的动力传递到驱动轮上实现变速的。
【单选题】下面哪一项会导致通货膨胀指数进一步上升?()
A.
CPI 和 PPI 都涨价
B.
CPI 和 PPI 都降价
C.
PPI 涨价， CPI 降价
D.
CPI 涨价， PPI 降价
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