下列措施中，能使蒸发加快的是(   )

材料一：去年上半年，全国2212万人因干旱而饮水困难，其中79%的人集中在江西、云南、贵州、广西等地。今年上半年我国南方又持续干旱，其中以江西、湖北等几省市尤为严重。

材料二：我国属于缺水国之列，人均淡水资源仅为世界人均淡水量的1/4，居世界第109位。在人均水资源方面，中国已被列入全世界13个贫水国家之一，而且水资源分布不均，大量淡水资源集中在南方，北方淡水资源只有南方淡水资源的1/4。据统计，全国600多个城市中有一半以上城市不同程度缺水，沿海城市也不例外，甚至更为严重。

把a²﹣4a多项式分解因式，结果正确的是（　　）

从下面方框中选出8个单词，用它们的适当形式填入短文空格内，使短文意思正确、通顺。(每词限用一次) 

    Mr. Shute lives in a village. He has got a big family and a strong dog. His farm is small____ he is often free in winter. So he goes to a city and finds work there.
    Once he stayed in a city for two ____  . When New Year was coming, he went back home to see his wife and his children. On his way home, something was ____  with his eyes. When he knocked on the door, his dog ____  out and was not friendly to him. His wife hurried to drive it away. The next morning he went to see a doctor. The doctor looked over his eyes ____ and gave him some ____ . Before he left, he told the doctor about his dog. When he heard this, the doctor began to laugh and said, “Maybe something is wrong with your dog's eyes, too.”
    When Mr. Shute got home, he told his wife about it. The woman said, “I'm afraid it's true. If a thief comes into our house, it won't see him and he'll steal ____here.”
    Mr. Shute thought his wife was right. He then made his dog ____ his medicine instead.

如果随机变量§~N（—2，${\sigma }^2$），且P（—3≤§≤—1）=0.4，则P（§≥—1）=（）