如图所示的四种家用电器中，主要将电能转化为机械能的是（　　）

下列选项能正确表示13日风的符号的是

某学生的论文把英国“光荣革命”、美国l787年宪法、法国1875年“一票共和”、设计德国政治管理模式的俾斯麦等作为重要证据。该论文的主题最有可能是（         ）

    Going to the zoo

    The students of our School go to the zoo. They see a lot of animals. In the afternoon, they get back to school. The teacher asks them which animal is their favourite. Each student gives an answer. Some animals are very popular. Other animals are not. Here is a chart (图表) the students make at school. It shows the animals the students like best.

咸海（内流湖）原为世界第四大湖，因人类过度利用而迅速萎缩，2014年咸海大部分干涸消失。图为咸海区域图。据此完成以下问题。