[单选题]What is special about the battery?

正确答案 ：A

It is built in an iPhone.

[单选题]6根据4判断，在非洲土地退化的区域中，面积最大的气候类型的特征是

正确答案 ：B

全年高温，分干湿两季

[单选题]( )by the advances in technology, many farmers have set up wind farms on their land.

正确答案 ：C

Encouraged

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