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【单选题】
下列选项中不属于供配电系统功能的是______。A.
保证行车安全、减少交通事故
B.
能保证人身安全、供电可靠，技术先进
C.
确保电压质量，满足用电设备的用电要求
D.
具有相应的控制和调节功能，以实现经济合理、维修施工方便以及降损节能运行
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【单选题】40) In the absence of technological progress, which of the following is true when the economy is operating at the steady state?
A.
The growth of output per worker is equal to the saving rate.
B.
The growth of output per worker is equal to the rate of investment.
C.
The growth of output per worker is zero.
D.
The growth of output per worker is equal to the rate of depreciation.
E.
none of the above
【单选题】In the absence of national monetary policy and national exchange rates in the European Monetary Union,
A.
that Union cannot survive.
B.
that Union will have to expel members who do not agree to austerity measures.
C.
there are still steps that the Union can take to survive.
D.
That Union will have to be bailed out by the European Central Bank.
【单选题】袋中共有7个大小相同的球，其中3个红球、2个白球、2个黑球．若从袋中任取3个球，则所取3个球中至少有2个红球的概率是（ ）
A.
4 35
B.
13 35
C.
18 35
D.
22 35
【简答题】通过外围设备I/O输入来启动信号时,需要将机器人置于____状态。
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