如图是研究电磁铁的电路，下列说法正确的是（） A．合上开

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问题选择题

如图是研究电磁铁的电路，下列说法正确的是（）

A．合上开关后，线圈A端是北极

B．合上开关后，线圈AB端的极性无法判断

C．当滑动变阻器的滑片向左移动时，电流表的示数增大，小铁片的偏角会增大

D．当滑动变阻器的滑片向右移动时，电流表的示数增大，小铁片的偏角会增大

答案

答案：C

多选题

下图表示动物细胞中各种化合物和主要元素占细胞鲜重的含量的多少(未完全按实际比例)，以下按①②③④顺序排列，正确的是

A．蛋白质、水、脂质、糖类

B．水、蛋白质、糖类、脂质

C．O、C、N、H

D．C、O、H、N

补全对话，情景问答

口语应用：在下列横线上填入适当的话语，使对话完整。

Zhou: Hi, Chen Lu, did you watch TV last night?

Chen: Yes. A lot of people lost their homes and even lives in the Sichuan earthquake (地震).

Zhou: That's really terrible. 1______

Chen. Perhaps we can have a party to raise money to help them.

Zhou: 2______ When shall we have it?

Chen: Let's make it half past seven tomorrow evening.

Zhou: 3______

Chen: Maybe in the school hall. I'll turn to our teachers for advice.

Would you mind asking more classmates for help?

Zhou: 4______

Chen: Let's try our best to make it successful. 5______

Zhou: See you.