机动车仪表板上（如图所示）亮表示什么？（）
A．迎面出风
B．空气外循环
C．空气内循环
D．风窗玻璃除霜
参考答案：C
内容分析是一种对传播内容进行客观、系统和________描述的研究方法。
4. Mr. Smith ______ that he had made a mistake and that he had corrected it.
A．accepted
B．admitted
C．talked
D．Promised
