问题 选择题

有的幼儿吃了很多钙片,但仍患佝偻病,主要原因是缺乏

A.维生素A

B.维生素B

C.维生素C

D.维生素D

答案

答案:D

题目分析:食物中缺乏某种维生素或维生素的吸收利用发生障碍,就会引起物质代谢失常,影响正常生理功能,以致表现为维生素缺乏症,例如维生素D促进人体对钙、磷的吸收和骨骼的发育,因此,体内缺钙的人在补钙的同时,还要加服维生素D,否则,摄入的钙不会被吸收,缺钙易患佝偻病、骨质疏松等,因此小丽患了佝偻病,她多喝牛奶的同时,还应该让她服用维生素D,以促进钙的吸收。

点评:此题为基础题,难度一般,解答本题的关键是熟记维生素D有促进钙磷吸收的作用。

单项选择题
完形填空
Have you ever had to decide whether to go shopping or stay home and watch TV on a weekend? Now you  36 do both at the same time. Home shopping television networks(网络) have become a  37 for many people to shop without  38 having to leave their homes.
Some shoppers are  39 of department stores and supermarkets—40 the crowds, waiting in long lines, and sometimes   41 of finding anything they want to buy. They’d rather sit quietly at home in front of the TV set and   42  a friendly announcer describe a product   43  a model shows it. And they can   44  around the clock, buying something   45  by making a phone call.
Department stores and even mail-under companies are   46  to join in the success of home shopping. Large department stores are busy  47 their own TV channels(频道)to encourage TV shopping in the future.  48 can ask questions about products and place   49  , all through their TV sets.
Will shopping by television   50  take the place of shopping in stores? Some industry managers think so.  51  many people find shopping at a   52  store a great enjoyment. And for many shoppers, it is still important to   53  or try on dresses they want to buy. That’s   54  specialists say that in the future, home shopping will   55  together with store shopping but will never entirely replace(取代) it.
小题1:
A.mustB.shouldC.shallD.can
小题2:
A.programB.wayC.reasonD.purpose
小题3:
A.everB.neverC.stillD.once
小题4:
A.proudB.fondC.tiredD.careful
小题5:
A.fightingB.strikingC.treatingD.stopping
小题6:
A.senseB.doubtC.hopeD.feeling
小题7:
A.seeB.watchC.letD.notice
小题8:
A.untilB.sinceC.ifD.while
小题9:
A.shopB.waitC.turnD.deliver
小题10:
A.suitablyB.cheaplyC.simplyD.hardly
小题11:
A.nervousB.luckyC.equalD.eager
小题12:
A.putting upB.making upC.setting upD.looking up
小题13:
A.GuestsB.AssistantsC.ManagersD.Customers
小题14:
A.ordersB.goodsC.booksD.answers
小题15:
A.lastlyB.finallyC.especiallyD.fortunately
小题16:
A.ThenB.YetC.HoweverD.Therefore
小题17:
A.generalB.popularC.realD.true
小题18:
A.designB.makeC.wearD.touch
小题19:
A.howB.whyC.whatD.when
小题20:A. exist               B. practice         D. follow           D. appear