下列关于电磁波的一些说法中正确的是[ ] A．电磁波在真空中不能传播 B．电磁波
题型：选择题
问题：
下列关于电磁波的一些说法中正确的是[ ]
A．电磁波在真空中不能传播
B．电磁波在空气中的传播速度约为340m/s
C．红外线属于电磁波
D．电热水壶是利用电磁波来工作的
题型：选择题
The Slender West Lake Scenic Spot lies in the northwestern part of Yangzhou, with its south gate facing Great Rainbow Bridge Road. It covers an area of about 123.6 hectares. The Slender West Lake was named a National Key Scenic Spot in 1988 and National AAAAA Tourist Area in 2010.  The Slender West Lake used to be a long river named the Baozhang Lake, which is 4 kilometers in length and less than 100 meters in width. A famous poet Wang Hang in the Qing Dynasty once composed a poem (诗歌), from which the Slender West Lake gets its present name and to which it owes its great fame (名声) both at home and abroad. During the Sui and Tang Dynasties, many gardens were built along the Slender West Lake. Following the lines of the natural landscape, a large number of buildings along the moats(护城河) were constructed(建造) in different locations during different periods. Emperors Kangxi and Qianlong of the Qing Dynasty both visited the Slender West Lake. The Slender West Lake Scenic Spot is an outstanding representative (代表) of the lake gardens in China. In a word, the Slender West Lake not only represents the beauty of natural landscape（风景）, but also embodies (体现) the richness of its history and culture. The Slender West Lake
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