PC机上的打印机与主机间最常用的接口是.() ["RS-232-C接口","Centronics接口","IEEE488接口","SCSI接口"]
巴菲是一种以鸡蛋和()为主要原料的冷冻甜食。 ["A、面粉","B、牛奶","C、奶油","D、白糖"]
糖尿病肾病的危险因素,不包括()。 ["遗传因素","恶性肿瘤","吸烟","老年","微血管病变"]
如果信号是60分贝,噪音是40分贝,那么信噪比就是()。 ["20","100","1.5","2400"]
谁提出了媒介决定论?() ["伊尼斯","梅罗维茨","麦克鲁汉","布热津斯基"]
脊髓的动脉有起自椎动脉的()。动脉和起自节段性动脉的()。