How many four-digit positive integers have their product of digits even?
数字之积为偶数的四位正整数共有多少个?
来源:互联网摘选A circ is an undirected graph having only vertices of even nonzero degree.
一广义圈是一无向图,其顶点次数都是非零偶数.
来源:词典精选例句Sprocket most taboo even sprocket , the chain sprocket on the accelerated wear!
最忌讳偶数,这样的对链条加速磨损!
来源:网络文摘精选All east-west interstate highways are even-numbered and increase from south to north.
所有东西向的州际高速公路都用偶数标号,数字从南往北递增.
来源:互联网摘选Each face is assembled from an even number of veneer pieces of uniform width before trimming.
在裁切前,每个面由偶数,宽度相同的木皮拼贴.因此,板面的中心线就是木皮接缝.
来源:网络文摘精选
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