问题 填空题

化学与人类生活的关系越来越密切.结合我们所学的化学知识,请你回答下列问题:

(1)每年的5月20日是“中国学生营养日”,据有关报道,我国学生普遍存在无机盐、维生素等摄入量不足,糖类、脂肪摄入量过多的问题.在各种食物中,富含糖类的一种物质是______.

(2)豆腐制作是中国古代的一项重要发明,现在豆腐在全球已成为颇受欢迎的食品,

如表是豆腐中主要成分的平均质量分数:

成分蛋白质油脂糖类维生素B1维生素B2
质量分数/%89.34.71.32.80.240.0641.40.000060.00003
①除水、无机盐和维生素外,豆腐中还含的营养素有______,含人体所需的微量元素是______.

②人体所需能量的主要来源是______类.

③人体缺钙可能引起______(填字母).A.贫血;B.佝偻病;C.坏血病;D.骨质疏松;E.; 软骨病

④若成年人每天食用60克豆腐,则摄入铁的质量为______克.

答案

(1)生活中富含糖类的物质有蔗糖、淀粉、葡萄糖等;

(2)①由图表中数据可知豆腐中还含的营养素有蛋白质、油脂、糖类;人体内的微量元素有:铁、锌、碘、硒等;

②人体内的热量的60%-70%来自于糖类,所以人体所需能量的主要来源是糖类;

③钙主要是构成人体的骨骼和牙齿的主要成分,所以缺钙容易得佝偻病、骨质疏松、软骨病;

④60克×1.4%=0.84g.

故答案为:

(1)蔗糖、淀粉、(大米等合理答案即给分);

(2)①蛋白质、油脂、糖类;Fe;②糖;③B、E、D;④0.84g.

完形填空
Even as I write this story, I am still smiling. The past few weeks have been rather       , but when a large number of smile cards arrived in my mailbox the other day, having traveled from the United States to my home in the Netherlands, I knew things were about to         .
I          where to leave the cards: the train, benches at the station, libraries, mailboxes—the possibilities were         .
I woke up, went to work, and        , I went to the shop to buy some candy bars,         to leave them as anonymous (匿名的) gifts for people on the train.        , my train home was extremely         and I couldn’t find a place to leave the gifts. An elderly man must have        me searching for a place to leave them, because he asked me if I was          something.
Right then I          that my first smile card would not be anonymous. With a big smile, I told him that I found what I was looking for,         him the candy bar and a card. He had only just finished reading the card          I arrived at my          and got off the train, but he was still smiling and         his candy as I waved at him from the        .
Despite having worked for a full day, I         bounced (跳) home. Before I entered my         , I delivered a few more smile cards and candy bars to people’s mailboxes. I added a(n)          candy bar for a neighbor who was in a difficult financial situation, but worked hard every day to get the very best for his young son. I figured they both        a tasty little treat.
小题1:
A.joyousB.simpleC.tough D.colourful
小题2:
A.turn awayB.turn aroundC.turn up D.turn in
小题3:
A.required B.realized C.declared D.wondered
小题4:
A.small B.important C.specificD.endless
小题5:
A.otherwise B.afterwardsC.insteadD.sometimes
小题6:
A.stopping B.continuingC.agreeingD.planning
小题7:
A.However B.BesidesC.ThereforeD.Anyway
小题8:
A.specialB.commonC.crowded D.modern
小题9:
A.preventedB.seenC.heardD.left
小题10:
A.picking upB.caring aboutC.looking forD.referring to
小题11:
A.advisedB.decidedC.wishedD.ordered
小题12:
A.buyingB.postingC.sendingD.handing
小题13:
A.whenB.whileC.untilD.once
小题14:
A.hometownB.companyC.countryD.stop
小题15:
A.receivingB.enjoyingC.findingD.dividing
小题16:
A.entranceB.officeC.platformD.bench
小题17:
A.tiredlyB.excitedlyC.fortunatelyD.carefully
小题18:
A.apartmentB.farmC.city D.classroom
小题19:
A.extraB.perfect C.typicalD.ordinary
小题20:
A.rejected B.deserved C.afforded D.forgot
名词解释