麦克鲁汉把媒介分成热媒介和冷媒介两大类，下面四种传播媒介中属冷媒介的（）.
A.照片
B.电影
C.印刷品
D.电视
参考答案：D
Man: Would you like to see a movie with me tonight ( ) Woman: It looks like raining. The above sentences are linked by ______.
A．grammar
B．lexical
C．phonetics
D．meaning
测量电解液的密度通常是为了（）。
A、判断蓄电池的电压
B、确定蓄电池的额定容量
C、测量启动电流
D、判断蓄电池的放电状态
