In 1973, I was teaching elementary school. Each day,27kids1“The Thinking Laboratory.” That was the 2 students voted for after deciding that “Room 104” was too3.

    Freddy was an average4,but not an average person .He had the rare balance of fun and compassion（同情）.He would5 the loudest over fun and be the saddest over anyone's6.

    Before the school year7,I gave the kids a special 8, T-shirts with the words “Verbs Are Your9” on them. I had advised the kids that while verbs（动词）may seem dull ,most of the10 things they do throughout their lives will be verbs.

    Through the years, I'd run into former students who would provide 11 on old classmates. I learned that Freddy did several jobs after his 12 from high school and remained the same 13 person I met forty years before .Once, while working overnight at a store, he let a homeless man 14in his truck. Another time ,he 15a friend money to buy a house .

    Just last year, I was16 a workshop when someone knocked at the classroom door. A woman17 the interruption and handed me an envelope. I stopped teaching and 18 it up. Inside were the “Verbs” shirt and a 19 from Freddy's mother. “Freddy passed away on Thanksgiving. He wanted you to have this.”

    I told the story  to the class. As sad as it was, I couldn't help smiling. Although Freddy was taken from us, we all20something from Freddy.

Pb（s）+PbO₂（s）+2H₂SO₄（aq） $\underset{充电}{\overset{放电}{\rightleftarrows }}$  2PbSO₄（s）+2H₂O（l）下列说法不正确的是（   ）

在下列①②处补写恰当的语句，使整段文字语意完整连贯，内容贴切，逻辑严密。每处不超过20个字。

    司马谈把先秦诸子划分为“六家”，刘歆在此基础上进一步划分为“十家”。这对春秋战国思想的研究是有贡献的，但应指出，①   。如杨朱学派在当时影响颇大，而且杨朱与老子、庄子不同，其观点立场更不一样，不宜列入道家，应是独立的一家。还应指出，随着社会的发展变化，②   。据韩非所说，孔子死后儒家分为八派。在儒家八派中，影响较大的是孟子和荀子。孟子和荀子都不是简单地继承孔子，而是各有发展。