AFC电路通常由()三部分组成。
A、鉴频器、低通、受控元件
B、鉴频器、高通、压控振荡器
C、鉴频器、低通、压控振荡器
D、鉴频器、振荡器、高通
参考答案:C
Three hundred multiples of three are picked at random, and three hundred multiples of four are picked at random. Approximately what percentage of the six hundred selected numbers are even ?()
A. 100%
B. 75%
C. 66%
D. 50%
E. 33%
把少量下列物质分别放入水中,充分搅拌,可以得到溶液的是
A.食盐
B.面粉
C.植物油
D.碳酸钙