题目

关于电场和电磁波的说法正确的是(   ) A.电场和磁场总是相互联系的,它们统称为电磁场 B.电磁场由发生区域向远处传播就是电磁波 C.电磁波是传递能量的一种方式 D.电磁波是一种物质,可以在真空中传播 答案:BCDWhen Tom saw the pandas in the zoo, he said excitedly, "How cute they are!" The underlined sentence is used to ________.A.express strong feelingsB.make a statementC.ask someone a questionD.give an instruction
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