题干

电热在人们的生活中,有危害也有运用,请就如何防止和利用电热各举出一例.
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答:(1)电热危害的例子:电线发热引起火灾、电动机因电热而烧坏;夏天,电器用了一段时间后要停用一会,是为了防止电热造成的危害;(2)利用电热的例子:电热水器、电饭锅、电热水壶、电烙铁、电暖气等;春天,电器隔一段时间后要用一下,是为了利用电热来驱潮.

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阅读理解

    While beach vacations may be a great way to take your mind off work,lakes surrounded by mountains make for an even grander experience.If you are looking for some peace on your vacation,we have some recommendations for you in the Caucasus(高加索).

Lake Sevan

    Lake Sevan is situated in the central part of Armenia,in the Gegharkunik province.It is the largest lake in Armenia,located 6,200ft above sea level.Along the lake shore,there are various accommodations such as resorts and hotels with plenty of activities to partake in such as windsurfing,swimming and sunbathing.While there,do not forget to visit one of the famous cultural monuments,the Sevanavank Monastery,and it offers a great view of the lake as well.

Lake Paravani

    Lake Paravani,located at 6,801ft above sea level,is in the south of Georgia,near the Javakheti plateau.At this level,altitude sickness can occur and it is a good idea to be prepared to adapt to it properly,or bring medication for altitude sickness.Being a volcanic lake makes for a more interesting experience.The lake is best known for fishing.Do not come home during the winter months when the lake freezes.

Lake Cildir

    Lake Cildir is located in the Ardahan province,East Turkey,near the borders of Georgia and Armenia.It is the second largest freshwater lake of Eastern Turkey,and many tourists are not aware of this beautiful attraction.Lake Cildir is surrounded by mountains of the Caucasus.The lake freezes during late November.If the winter is not extremely cold,you can try some lake activities like ice skating and ice fishing.

Lake Van

    Lake Van is the must visit of all lakes in this list.The largest lake in Turkey,Lake Van is located on the eastern shore of Turkey and is also the most accessible lake here.It's situated at 5,380ft above sea level,and unique to lakes around the world,the water is high in salt content.