继电器是利用低电压、弱电流的通断来间接控制高电压、强电流电路的装置．请在图所示电磁继电器示意图中接低压电源的位置画上开关和电池符号．

继电器是利用低电压、弱电流的通断来间接控制高电压、强电流电路的装置．请在图所示电磁继电器示意图中接低压电源的位置画上开关和电池符号．

My parents don't allow me             TV on schooldays.

My parents don't allow me             TV on schooldays.

情景交际  通读下面的对话，根据上下文补全对话内容。

A:Hey, Peter! You look tired. {#blank#}1{#/blank#}?

B: I didn't get enough sleep last night.

A:Were you just doing your homework last night?

B: {#blank#}2{#/blank#}. Mountains of homework, math, chemistry, Chinese … I didn't finish it until midnight.

A: Poor guy! No wonder you don't look well.

B: You know, less sleep is bad for my health. I am not as energetic as before. {#blank#}3{#/blank#}?

A: Sure. I advise you to make a plan before doing your homework. First things first. And you'd better do some outdoor sports.

B: {#blank#}4{#/blank#}. I am going to follow your advice.Thank you.

A: Um … If youare too busy on weekdays, just relax yourself at weekends.

B: Weekends? No kidding. I have to take after-school classes at weekends.

A: You do?{#blank#}5{#/blank#}?

B: Because my parents want me to get into a good high school.

A: Yes, I guess that is the reason. Perhaps you should talk to them and explain that health is the most important.

B: You are right. Thanks for all the good advice. I'll try to talk to them.

我国的植树节是（　　）

下列图案中既是中心对称图形，又是轴对称图形的是（　　）

下列图案中既是中心对称图形，又是轴对称图形的是（　　）