A few days ago, I got a call from an old friend of mine. We 1 our school and the good old days. Then, he started talking about his father.

    His father was badly ill in hospital. He 2 sleep at night and often talked to himself. My friend was 3 about this and shouted at his father to stop talking. But after stopping 4, his father fell unconscious(不省人事的). My friend was very sad. He thought it was his fault(过错). My friend was so sad that he 5 like a baby on the telephone. He said he would do 6 if his father could wake up.

    Some kids often feel unhappy when they have to take care of their 7. But do you know that our parents take care of us 8 stay with us for our lifetime?

    My dear friends, from now on, 9 say a bad word to your parents. Take care of them and stay with them. Even if it only 10 you a second, you parents will be happy to be with you! Do you agree with me?

某欧姆表的内部结构如图甲所示电路，欧姆表开关拨至“ ”，并进行了必要的调零。一同学准备用一个电阻箱R_x较精确地测出欧姆表的电源的电动势E和该倍率下完成调零后欧姆表的内阻 ，他的操作步骤是：

a．将欧姆表与电阻箱R_x连成图甲所示的闭合电路；

b．调节电阻箱阻值，记下电阻箱示数R_x和与之对应的电流表G的示数I；

c．将记录的各组R_x、I的数据描点在图乙中，得到 图象；

d．根据图乙作得 的图象，求出电源的电动势E和欧姆表内阻R_内。