题干

塑化剂主要用作塑料的增塑剂,也可作为农药载体、驱虫剂和化妆品等的原料.添加塑化剂(DBP)可改善白酒等饮料的口感,但超过规定的限量会对人体产生伤害.其合成线路图如图I所示:

已知以下信息:①

② (-R1、R2表示氢原子或烃基)

③C为含两个碳原子的烃的含氧衍生物,其核磁共振氢谱图如图Ⅱ所示

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同类题1

阅读下列材料:

材料一:(北宋)中央政府继续刻印图书,除国子监承刻之外,其他政府部门和地方官署都刻书、印书,全面开展了政府刻书事业……刻书内容范围更加扩大,不仅刻印儒家经典著作,又遍刻正史、医书、诸子、算书、字书、类书和名家诗文,政府还编印了四部大型类书以及佛、道藏经典。私人刻书以文集最多,坊间刻书则以售卖营利为主,除了刻印经文以外,又另刻有字书、小学等民间所需用及士子应举所需要的读物,品类丰富繁多。

——张树栋《中华印刷通史》

材料二:谷登堡的印刷术一经发明,立即以惊人的速度普及开来,20年间就传遍了欧洲。15世纪末,欧洲大约有3万种,2 000多万册书籍被印刷发行,印刷种类也从宗教文件扩大到自然科学、哲学、文学和教科书,广泛地传播了新的信息和长期被垄断的知识……1474年,距(欧洲)活字印刷术发明仅30年,欧几里德的《几何原本》的活字印刷版就发行了,哥白尼的《天体运行论》在他生前就有了活字印刷版,他是抚摸着他的著作的印刷本去世的……印刷机的出现,使“危险思想”的传播变得对统治阶级更加危险了。在欧洲的封建统治者看来,哲学和自然科学的新思想是异端邪说,必须禁止其发表。

——饶立华《谷登堡的印刷术与大众传播》

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同类题4

阅读下面短文,掌握其大意,然后从各题所给的A、B、C、D四个选项中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。

    As I drove my blue Buick into the garage, I saw that a yellow Oldsmobile was 1too close to my space. I had to drive back and forth to get my car into the 2 space. That left 3 enough room to open the door. Then one day I arrived home 4 , and just as I turned off the engine, the yellow Oldsmobile entered its space — too close to my car, 5 . At last I had a chance to meet the driver. My patience had 6 and I shouted at her, “Can't you see you're not 7 me enough space? Park farther over.” Banging(猛推) open her door into 8 , the driver shouted back: “Make me!” 9 this she stepped out of the garage. Still, each time she got home first, she parked too close to my 10 . Then one day, I thought, “What can I do?” I soon found 11 . The next day the woman 12 a note on her windshield(挡风玻璃):

    Dear Yellow Oldsmobile,

    I'm sorry my mistress(女主人) shouted at yours the other day. She's been sorry about it. I know it because she doesn't sing anymore while 13 . It wasn't like her to scream 14 . Fact is, she'd just got bad news and was taking it out on you two. I 15 you and your mistress will 16 her.

Your neighbor,

Blue Buick

    When I went to the 17 the next morning, the Oldsmobile was gone, but there was a note on my windshield:

Dear Blue Buick,

    My mistress is sorry, too. She parked so 18 because she just learned to drive. We will park much farther over after this. I'm glad we can be 19 now.

Your neighbor,

Yellow Oldsmobile

    After that, whenever Blue Buick 20 Yellow Oldsmobile on the road, their drivers waved cheerfully and smiled.