【单选题】【消耗次数:1】
脚气病是由于缺乏下列哪一种维生素引起的
维生素A
维生素B1
维生素B2
维生素C
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【单选题】 如缺乏可导致脚气病的维生素是
①  维生素A;
②  维生素C;
③  维生素B<sub>1</sub>;
④  维生素PP;
⑤  维生素B<sub>2</sub>
【判断题】 维生素A是水溶性维生素,维生素B2是脂溶性维生素。
①  正确
②  错误
【单选题】 下列哪种维生素是脂溶性维生素
①  维生素C
②  维生素B2
③  维生素B6
④  维生素B1
⑤  维生素E
【单选题】 维生素包括:水溶性维生素A和C,脂溶性维生素B、D、E、K。
① 
② 
【多选题】 以下维生素中,属于水溶性维生素的是?
①  烟酸
②  维生素B1
③  维生素E
④  视黄醇
【判断题】 当人体缺乏维生素A时会引起脚气病。
①  正确
②  错误
【单选题】 维生素B1缺乏会引起()
①  口角炎
②  面部皮肤病
③  脚气病
④  齿龈出血
【判断题】 反刍动物能合成维生素B和维生素C,所以一般没有维生素缺乏症
①  正确
②  错误
【单选题】 下列哪一种维生素的缺乏会导致夜盲症?
①  维生素A
②  维生素C
③  维生素D
④  维生素B
【判断题】 维生素只有水溶性维生素这一种。
①  正确
②  错误
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②  turn off
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【单选题】 ______,the boy worked out the problem quickly.
①  As clever he is
②  Clever as he is
③  He is as clever
④  As he is clever
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①  all of their homes
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①  What are you doing here
②  Whats your name
③  Where are you from
④  How may I help you
【单选题】 Not until the pretty woman opened her mouth and spoke, ______she was a foreigner.
①  did I realize
②  had I realized
③  I had realized
④  I realized
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①  vision
②  view
③  glass
④  window
【单选题】 I have lost my white hat. I______ it somewhere.
①  must be dropping
②  must have dropped
③  must have been dropped
④  must drop
【单选题】 Only when we landed______ how badly the plane had been damaged.
①  we realized
②  did we realize
③  had we realized
④  we had realized
【单选题】 InIndiamorethanthree hundredlanguagesarespoken,______whichonlyfourteenarerecognizedasofficial.
①  of
②  in
③  with
④  within
【单选题】 HelenKeller,whowasbothblindand______,overcameherinabilitywiththehelpofherteacher,AnnSullivan.
①  deafness
②  deafening
③  deaf
④  deafened