共阳极半导体数码管（ LED）是指（） 。
A、阳极连在一起，接高电平，阴极为高电平的发光二极管亮A
暂无解析
The professor worked for 7 hours at a ________.
Lying under the skull, the human brain contains an average of ten billion nerve cells called ______.
A mong the following words, “ ______ ” does NOT have inflectional affixes.
The word “minister” originally meant “a servant”, but now has changed to“a head of a ministry ”. This process of meaning change is called ______ .
Since economic reform began in 1978, an average growth rate of almost 10% a year has seen Ch ina ’ s GNP nearly quadruple.（）
