高二英语期中试卷
考试时间：90分钟 满分：120分
命题：卜楠 审题：刘岩 2017.05.16
本试卷分第Ⅰ卷和第Ⅱ卷两部分。第Ⅰ卷为选择题，第Ⅱ卷为非选择题。
第Ⅰ卷 （选择题 70分）
A
The zebra belongs to the horse family.One of nature’s great mysteries is why the zebra has stripes.One theory is that the stripes help the zebra cool down.On hot days the black stripes get a lot hotter than the white area of the zebra and under the black stripes there are special layers of fat for protection.Hot air then rises off the black stripes，forcing colder air down around the white areas，cooling the zebra down.This，however，is just a theory.The stripes can
