题干

秸秆还田既增加了土壤肥力,又降低了环境污染,你认为秸秆变肥料的过程中起主要作用的是(    )

A:生产者

B:消费者

C:分解者

D:无机环境

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答案(点此获取答案解析)

C

同类题2

阅读下面的文言文,完成后面小题。

项脊轩志

归有光

    项脊轩,旧南阁子也。室仅方丈,可容一人居。百年老屋,尘泥渗漉,雨泽下注;每移案,顾视无可置者。又北向,不能得日,日过午已昏。余稍为修葺,使不上漏;前辟四窗,垣墙周庭,当南日,日影反照,室始洞然。又杂植兰桂竹木于庭,旧时栏楯,亦遂增胜。借书满架,偃仰啸歌,冥然兀坐,万籁有声。而庭阶寂寂,小鸟时来啄食,人至不去。三五之夜,明月半墙,桂影斑驳,风移影动,珊珊可爱。

    然予居于此,多可喜,亦多可悲。先是,庭中通南北为一。迨诸父异爨,内外多置小门墙,往往而是。东犬西吠,客逾庖而宴,鸡栖厅。庭中始为篱,已为墙,凡变矣。家有老妪,尝居于此。妪,先大母婢也,乳二世,先妣抚之甚厚。室西连于中闺,先妣尝一至。妪每谓予曰:“某所,而母立于兹。”妪又曰:“汝姊在吾怀,呱呱泣,娘以指叩门扉曰:‘儿寒乎?欲食乎?’吾从板外相为应答……”语未毕,余泣,妪亦泣。余自束发,读书轩中。一日,大母过余曰:“吾儿,久不见若影,何竟日默默在此,大类女郎也?”比去,以手阖门,自语曰:“吾家读书久不效,儿之成,则可待乎!”顷,持一象笏至,曰:“此吾祖太常公宣德间执此以朝,他日汝当用之!”瞻顾遗迹,如在昨日,令人长号不自禁。

    轩东,故尝为厨,人往,从轩前过。余扃牖而居,久之,能以足音辨人。轩凡四遭火,得不焚,殆有神护者。

    余既为此志,后五年,吾妻来。时至轩中,从余问古事,或凭几学书。吾妻归宁,述诸小妹语曰:“闻姊家有阁子,且何谓阁子也?”其后六年,吾妻死,室坏不修。其后二年,余久卧病无聊,乃使人复葺南阁子,其制稍异于前。然自后余多在外,不常居。

    庭有枇杷树,吾妻死之年所手植也,今已亭亭如盖矣。

同类题4

根据短文理解,选择正确答案。

    John Smith was a very handsome young man but he was lazy. He had finished his education and was happy to sit in his room and listen to the radio all day long. In fact, he had been doing nothing for almost six months, which worried his father a lot. One day Mr. Smith decided that he had to do something. “Johnny, When I was your age I was working and supporting my ten brothers and sisters. I want you to go out and get a job.” So that was what he did. In fact, in the next three months, Johnny started ten jobs and was fired from ten jobs. He explained to his father.

    “They wanted me to be at work at 8:00 a. m. and told me to do all sorts of unpleasant things.”

    “I don't care how you do it,” Mr. Smith said. “Either you earn some money or move out of the house. I gave you one week's time.”

    In the next few days Johnny began to change. He still stayed in his room all day, but spent his time writing letters and reading through the newspapers. More and more posts began to arrive for him. He bought a new suit for himself and invited his parents to the theatre and for dinner afterwards at the most expensive restaurant in town. When his proud parents arrived home after their evening hour, a policeman was waiting at the front door.

    “John Smith,” he said as he handed him a piece of paper, “I'll see you in the court tomorrow.”

    When he got outside, Johnny told his parents everything. “When you told me to earn some money, I decided to put an advertisement in the newspaper saying, 'New way to money fast! Send me $ 5 and I'll tell you my secret.' When I received the money I wrote back telling people to do as I do.”

    Johnny was fined $250 by the court and was ordered to pay all the people back. As he left the court house feeling very ashamed, a newspaper man came up to him, “Young man, would you like to tell your story to my newspaper for $2,500?”