【判断题】特别提醒:完成章节任务点(观看视频、音频)后方可答题 Nick is 25 years old.
【单选题】20 钢表示其平均含碳量 . 是 ( ) 。
【简答题】Watch the video. Read the statements. Write T (true) or F (false). 1 Nick is 25 years old. 2 Woo Sung speaks Chinese. 3 Natalie lives in Portugal. 4 Dan is pretty tall. 5 Woo Sung is tall and thin.
【判断题】共阴极结构的显示器需要低电平驱动才能显示。
【判断题】Nick is 25 years old.