简述无线通信的基本原理。阐述无线通信的特点。
题型：问答题 简答题
问题：
简述无线通信的基本原理。阐述无线通信的特点。
题型：问答题 简答题
| 根据阅读材料或短文内容。选择最佳答案.。 | ||
★生词提示:valid有效的
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| 1. The card is used for _____. | ||
| A. taking a taxi B. travelling by train C. taking a bus D. entering the college | ||
| 2. Lilian is _____. | ||
| A. a bus driver B. a university student C. a teacher in a college D. a middle school student | ||
| 3. The card can be used in any of the four _____. | ||
| A. cities B. colleges C. universities D. companies | ||
| 4. According to the reading material, if you find a lost card, you can _____. | ||
| A. sell it B. phone Lilian C. use it for travelling D. give it back to any Stagecoach driver | ||
| 5. You can not find _____ in the card. | ||
| A. Lilian's age B. the price C. the card number D. the time limit |
