接闪器所用材料应能满足机械强度和耐腐蚀的要求，还应有足够的热稳定性，以能承受雷电流的热破坏作用。
参考答案：对
根据短文内容选择正确答案．
小题1:If Jet goes from Beijing to Kunming，he can take the train_____.
A. D31l B.T6l C．K9018
小题2:From the table(表格)we know there are two trains from_____to other places.
A．Beijing B．Shenzhen C．Changsha
小题3:If Li Lei buys two tickets of K9018,he should pay_____yuan.
A．333 B．297 C 594
小题4: It is kilometers from Shanghai to Xi’an．
A. 1,463 B. 1,509 C. 854
小题5:Which of the following is TRUE according to the table?
A. Z92 is very crowded.
B. The train D311 is from Beiiing to Xi’an.
C. Lots of people take the train T61.
