有一则电视广告：“香飘飘奶茶，一年要销三万多杯，加起来可围绕地球三圈”．请问地球的赤道周长大约是（　　）

19世纪60年代，总长超过3万英里的美国铁路有多种轨距。南部铁路轨距以5英尺居多，北部最普遍的轨距是4．9英尺，部分地区还采用6英尺、5．6英尺的轨距。这反映出当时美国（   ）

假如你是李华。校英文报Growing pains栏目专门解答中学生的烦恼问题。现栏目收到一封来信。请根据这封信的内容写一封回信。

Dear Editor,

    I am really angry with my parents recently. Next Sunday is my birthday. My parents promised to buy a cell phone for me as my birthday present this year. But now when I ask about the birthday present they say they have changed their ideas, because they worry about my study if I get a new cell phone since the final exam is coming soon. They say a cell phone may take up too much of my time. I believe I am old enough to control myself, but they don't believe me. What's more, they broke their promise!

Li Yan

内容要求：

   1）理解父母良苦用心；

   2）手机有利有弊；

   3）给出你的建议。

注意：1）词数100左右；

      2）可适当增加细节，以使行文连贯；

      3）开头和结尾已写好。

Dear Li Yan,

    It's normal to have these feelings.

    ……

    I hope things will be better for you soon!

Yours,

Li Hua

下图为海洋与陆地夏季等温线分布理想模式图，甲、乙位于同一纬度，读图并结合所学知识，完成下列各题。