问题 填空题

(3分)人体缺乏维生素C(简写“VC”)就会患坏血病,哥伦布探险时的许多船员就因此而死亡。右图所示为某种“维生素C”说明书的一部分。请你回答:

(1)“VC”中含有  种元素,相对分子质量为_______。

(2) 若正常成人每天对“VC”的最低需要量为60mg。当“VC”完全来自右图的“维生素C”药片,则每天至少服用____次;

答案

(3分,每空1分)

(1)3 ;176; (2)3

:(1)根据维生素C的化学式为:C6H8O6,可知)“VC”中含有碳、氢、氧三种元素;Vc的相对分子质量为12×6+1×8+16×6=176;

(3)60mg÷(100mg×10%×2)=3(次);

故答案为:

(1)3;176;

(2)3.

完形填空
I am waiting for the bus when I meet the old woman. “You look       . Come and sit here,” she says. “      are you going?”
“I don’t know. I just want to catch a       and see what it will be like at the end.”
“I’m afraid you’ll see      there. Why don’t you enjoy the beautiful sights (风景)on the way? ”
“How can I do that when my heart(心) is      ?” I asks sadly. My best friend left(离开)me.
The woman seems to (似乎)understand my feeling. “Don’t cry, little girl. I had the same experience(经历) as you before . Thirty-five     ago, my husband left our three children and me. I was very sad. I wanted to kill (杀死)myself and the children, so I took        to the sea.        ,they seemed to know what would happen, so they       loudly. Their cry suddenly woke me up (叫醒) . How could I        my hope to live for one of life’s problems? After that, I worked hard to__  ___the children. Now they all live        and one of them has his own family. ”
Then the woman gives me a      , “We should never wait for the door to          before us. We should find the key to the      or try to find another way .”
The bus comes and I get on it with a smile.
小题1:
A.tiredB.good C.happyD.well
小题2:
A.WhatB.HowC.Where D.When
小题3:
A.trainB.busC.boatD.plane
小题4:
A.nothingB.everythingC.somethingD.anything
小题5:
A.smilingB.breakingC.singingD.dancing
小题6:
A.daysB.weeksC.monthsD.years
小题7:
A.herB.themC.himD.it
小题8:
A.SoB.Or C.AndD.However
小题9:
A.laughedB.talkedC.spokeD.cried
小题10:
A.make B.stopC.letD.take
小题11:
A.careB.look after C.play withD.look for
小题12:
A.happilyB.sadlyC.badlyD.happy
小题13:
A.cryB.shoutC.hitD.smile
小题14:
A.openB.closeC.lockD.mend
小题15:
A.classroomB.officeC.doorD.shop
填空题