TTL中的高电平电压为()。 A.VDD B.+2.8V-VCC C.+3V D.以 发布时间:2018-05-28 07:00 │ 来源:www.tikuol.com 题型:单项选择题 问题: TTL中的高电平电压为()。A.VDDB.+2.8V-VCCC.+3VD.以上都错误
题型:单项选择题 Some experts think that language learning is much________for children as their tongues are more flexible.[ ]A. easy B. easierC. easily D. more easily 查看答案