【单选题】天线的防雷保护接地电阻一般要求小于多少欧姆
【单选题】— I don't like English but I like Chinese very much. — ________. [ ]
【单选题】______ I didn't like English but now I find learning English is quite an interesting thing.
【单选题】—Do you like English _____ maths? —I like English. [ ]
【单选题】I like English very much, but he doesn't like it.
【单选题】—My favourite subject is English. But I don’t like Math. —I like English ___________ and I don’t like Math ___________.
【单选题】天线防直雷击的避雷器可固定在天线塔上,塔的金属结构也可做接闪器和引下线,塔的接地电阻一般不大于( ),若地层结构复杂,接地电阻不应大于( ),设置在电视塔或高层建筑上的微波站接地电阻应小于( )。
【单选题】I like Chinese, music , math, but I like English ______.