如图所示，电源电压恒定不变，当S闭合后，滑动变阻器的滑片P向右移动的过程中，下列说法正确的是（  ）
 

完形填空。
    Hello. I'm Jenny. I have a best friend.   1 name is Amy. We are in the same school. We both can sing and dance well. She is as  2 as me.
    At school, my teachers all can make 3   happy. But we must4  white blouse with the long sleeves. I am good 5   maths and English. She 6  English. She thinks it's difficult. Yesterday we7   a party at school. We enjoyed ourselves.
    At spare time, my favourite8   is winter. I like 9  snowmen in winter. But she likes eating ice creams in summer. What a pity!
    In two months' time, we are going to go to middle school. We are very busy every day. We  10   harder than now.

下列常见的生活用品中，主要使用合成纤维材料制成的是（　　）

关于系统的概念，下列说法正确的是(    )    

读图甲“我国某地降水量（实线）与蒸发量（虚线）的季节变化曲线示意图”，完成29—30题。

【小题1】当该地正值图甲中阴影部分对应的月份时，比较稳定地影响当地的天气系统是图乙中的

【小题2】当该地正值图甲中阴影部分对应的月份时，图乙中的天气系统持续稳定在该地区较长时间时，我国将出现