单边带信号应在下列电路中形成（）。A、激励器 B、宽放 C、功放 D、A、B、 发布时间：2019-12-23 07:27 │ 来源：www.tikuol.com 题型：单项选择题 问题： 单边带信号应在下列电路中形成（）。A、激励器 B、宽放 C、功放 D、A、B、C均可
题型：单项选择题 完形填空。 One morning a student was walking with his teacher when they noticed a pair of old shoes by the roadside. The owner of the shoes was working in a field nearby, and he had nearly finished his work. The student said to his teacher,"Let's play a trick on the man:we'll 1 his shoes, and wait to see what he does when he can't find them.""Myyoung friend, we should never have 2 by tricking others like that," answeredthe teacher. " Instead, let's put a 3 in each of the shoes, and watch what he will do." The student did so, and then they 4 nearby. The man soon came back to get his 5 , but when he slipped his foot into one of his shoes, he felt something 6 in it. He bent down and found the coin. Surprise appeared on his face. He looked at the coin for a minute, and then 7 ,but nobody could be seen. He then went on to put on the other shoe, but he was even more surprised to find the 8 coin. He then knelt down (跪下), looked up to heaven and said 9 aloud, in which he spoke of his wife, 10 and helpless, and his children without bread.The student was deeply 11 , and his eyes were filled with tears. " Now," said the teacher, "you must be much happier than if you had played your 12 ." The boy replied, “You have taught me a lesson which I’ll never 13 . I feelnow the truth of these words, which I didn't 14 before:"It is more blessed(神圣的) to 15 than to receive." ( )1. A. hide ( )2. A. lessons ( )3. A. stone ( )4. A. hid ( )5. A. lunch ( )6. A. terrible ( )7. A. looked up( )8. A. strange ( )9. A. goodbye ( )10. A. homeless( )11. A. amazed ( )12. A. trick ( )13. A. learn ( )14. A. hear ( )15. A. work B. wash B. experience B. coin B. stood B. coat B. hot B. looked aroundB. second B. yes B. lively B. excited B. role B. take B. understand B. refuse C. sell C. fun C. sweet C. worked C. drink C. hard C. looked downC interesting C. hello C. careless C. pleased C. game C. forget C. remember C. advise D. repair D. games D. clip D. rested D. shoes D. soft D. looked outD. lost D. thanks D. sick D. moved D. cards D. accept D. write D. give 查看答案
题型：单项选择题 不断创新帮助群众的方法体现为（）。A、帮助群众的方法要因时而变，动态化发展B、帮助群众的方法要有更强的全面性和综合性C、避免单打一，实现“一加一大于二”的最优效果D、帮助群众的方法要更加有效E、帮助群众的方法实现由“虚”向“实”的根本转型 查看答案