率先实现用的无线电通信实验，是哪两位科学家？
参考答案：
意大利人马可尼和俄国人波波夫。马可尼还获得诺贝尔奖。
在空白处填入适当的单词、短语或句子， 使对话完整。
A: Who is the woman over there?
B: That’s Wang Nan. She was a famous (1)_____player.
A: When and (2)_____ was she born?
B: She was born in 1978 in Liaoning.
A: (3)_____?
B: For about 24 years.
A: When did she start playing table tennis?
B: In 1985, (4)_____ seven.
A: When did she stop (5)_____ table tennis?
B: In 2008.
税收保全属于行政强制措施的范畴。
