在盛有水的烧杯中加入以下某种物质，形成溶液过程中，温度不会发生明显改变的是（　　）

This is my day

    I am a doctor. I work at night. I go to work at 6:30 p. m. I eat dinner at 9:30. I usually go home at 8:00 in the morning. After breakfast, I go to bed at 9:10 a. m. I usually get up at 2:30 in the afternoon. I eat lunch at 3:00 in the afternoon. Then I play sports at 4:00 in the afternoon.

    This is my day. I enjoy my life.

《蜀道难》的主旨句是：____，____。

导体两端的电压为6V，通过它的电流是0.3A，则该导体的电阻是____ Ω；若导体两端电压变为12V，则通过它的电流为____ A；若将电路断开，该导体的电阻为____ Ω．