问题
单项选择题
下面针对普通直流电动机改变主磁通调速的特点正确的是（）
A.实现无级调速困难
B.调速范围小
C.机械特性硬度不变
D.适合于恒转矩调速
答案
参考答案：B
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下面针对普通直流电动机改变主磁通调速的特点正确的是（）
A.实现无级调速困难
B.调速范围小
C.机械特性硬度不变
D.适合于恒转矩调速
参考答案：B
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| It 1 a Saturday 2 in Mary. When Mrs Ed-wards opened her curtains (窗帘) and looked out, she smiled and said,"It's going to 3 a beautiful day. "She woke up (唤醒) her small 4 at half past eight and 5 to him, "Get up, Tedday. We're going to go to the zoo today. Wash your hands nad face, brush your teeth and eat your breakfast quickly. We're going to go to New York 6 train." Teddy was six years old. He felt very happy 7 he liked going to the zoo a lot and he also liked going by train. He said,"I dreamed a bout the zoo 8 night, Mom."His mother was in a hurry, but she stopped and smiled at her small son."You did, Teddy?" she said,"And what 9 you do in the zoo in your dream?"Teddy laughed and answered," 10 , Mom! You were there in my dream, too." | ||||
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2011年10月10日是辛亥革命100周年纪念日。目前，全国政协已成立百年庆典筹备办公室，届时将隆重举行纪念活动。国台办也表示，支持海峡两岸各界共同举办纪念活动。阅读材料，回答问题。
材料一：读图：
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| 图一 起义军占领楚望台军械库 |  |
| 图二 孙中山在总统府前接受卫兵的致敬 |
（1）对于辛亥革命的百年庆典，许多城市展开了对庆典落户权的争夺。其中，很多人主张在武汉举行，也有不少人主张在南京举行。你支持哪一方？请依据上述图片提供的信息谈谈你的选择理由。
（3）材料三中，国共两党均表示继承中山先生的未竟事业，你认为“继承”的内涵主要是什么？
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