下列有关CRH2A型动车组绝缘测量的主要项目和标准叙述正确的有（）。
A.主回路501C～大地间≥0.2MΩ（使用300V兆欧表）
B.辅助回路SC200A～大地间≥0.1MΩ（使用100V兆欧表）；辅助回路200J～大地间≥0.1MΩ（使用100V兆欧表）
C.加热器回路200P1～大地间≥0.1MΩ（使用100V兆欧表）
D.驾驶室加热器回路：200S～GS间≥0.1MΩ（使用100V兆欧表）
参考答案：B, C, D
| 阅读下面对话，从方框内5个选项中选择恰当的句子完成此对话，并将其标号填入题前 括号内。 | |
| M: Where did you go for your summer vacation, Nancy? W: (1)___________________ M: (2)___________________ W: I have a pen pal Julia there. She asked me to go there. M: It was very hot in China then.(3)___________________ W: It was a bit cold there. M: (4)___________________ W: I visited Julia's home, her school and went to other places. M: (5)___________________ W: Yes, we did. And I took some pictures of them. M: Great! How I want to go thre for a vacation, too!
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