[单项选择]It is perhaps not an exaggeration (to say) that we shall soon (be trusting) our health, wealth and happiness to elements with (whom) very names the general public (are) unfamiliar. A. to say B. be trusting C. whom D. are
第28题: [单项选择]HFC电缆调制解调器一般采用的调制方式为 A. 调幅式 B. 调相式 C. 副载波调制式 D. 码分多址调制式 参考答案:C 答案解析:[解析] HFC电缆调制解调器的数据传输一般采用所谓的“副载波调制”方式进行,即利用一般有线电视的频道作为频宽划分单位,然后将数据调制到某个电视频道中进行传输。
第36题: [单项选择]This passage implies that_____. A. horizontal faults are more dangerous than vertical faults B. Vertical faults are more dangerous than horizontal faults C. Earthquakes occur only around fault areas D. California will break into pieces by an eventual earthquake 参考答案:C 答案解析:从全文可知,文章暗示,地震只发生在断层附近。故选C。