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【单选题】
用时间常数为0.35s的一阶装置去测量周期为1s的正弦信号,则测试幅值误差为多少?A.
58.6%
B.
32.7%
C.
8.5%
D.
6.3%
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皮皮学刷刷变学霸
举一反三
【单选题】Internal scale economies occur when:
A.
expansion of output by a firm leads to greater specialization of labor.
B.
expansion in an industry drives down the input prices.
C.
industry growth leads to a greater diffusion of knowledge among firms.
D.
a firm pays higher input prices to expand production.
【单选题】When is the internal temperature of a large desert mammal lowest?
A.
Just before sunrise.
B.
In the middle of the day.
C.
Just after sunset.
D.
Just after drinking.