通信专业英语Unit 09.pdf

《信息与通信工程专业科技英语》 Unit IX Third Generation Wireless Networks (1) Choose the word or phrase having the closest meaning to the underlined part. 1. Optical fibers are immune to electromagnetic interference and there is no cross talk. A. are resistive against electromagnetic interference B. are mutually related to electromagnetic interference C. are prone to electromagnetic interference D. are easy to take in electromagnetic interference 2. Over recent years this potential has largely been realized in the costs of the optical fiber transmission medium that for bulk purchases is now becoming competitive with copper wires. A. that is specifically for purchases, and is becoming superior to copper wires B. that is bulkily comparable in price with copper wires C. that is competing with copper wires in terms of the scale of purchases D. that is becoming a challenge to copper wires when bought in a large quantity 3. Rather than classify hardware on the basis of application characteristics one can rely on the intrinsic functionality of the hardware. A. the intelligent properties B. the inherent capabilities C. the interesting attributes D. propagation property 4. Similarities to historical technological developments are explored and contrasted with new technology to develop hypotheses regarding the future strategic impacts that these new technologies will have. A. are explained and combined with new technology B. are described and contained in new technology C. are expanded and contributed to new technology D. are revealed and compared with new technology 5. Some of the capture devices, keyboards in particular, also fall into this category. A. like special keyboards B. with particular keybo