题目

完成句子。 1. The ________________________(develop) of science has changed our life a lot. 2. Listening to a talk is ___________________ (please). We all feel bored. 3. Most of the visitors got lost in the ___________________(beautiful) of Tianmu Lake. 4. It’s __________________(use) to talk so much if you don’t match your words with actions. 5. All of us were excited at those ________________ (perform) performance. 6. Thousands of_____________________(tour) come to visit our city every day. 7. It’s his _________________(five) day in Guiling. 8. You are great. You have worked两只定值电阻，甲标有“10Ω 1A”，乙标有“15Ω 0.6A”，把它们串联起来，两端允许的最高电压是 A.10伏　　　B.15伏　　　C.19伏　　　D.25伏