问题
单项选择题
当（）缺乏时，鸡呈角弓反张，羽毛蓬乱，频繁痉挛，鸡的这种症状呈现“观星状”。
A、维生素B1
B、维生素B2
C、维生素B3
D、维生素B5
E、维生素B6
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
当（）缺乏时，鸡呈角弓反张，羽毛蓬乱，频繁痉挛，鸡的这种症状呈现“观星状”。
A、维生素B1
B、维生素B2
C、维生素B3
D、维生素B5
E、维生素B6
参考答案：A
What a busy day! The three boys were fed, bathed and changed into their nightclothes.Mary had ____ them a story and finally they were asleep.“Babysitting(照看)the three boys aged eight, six and four is extremely ____，” she thought. “Sleep，” she considered, “if only I could！” But she had difficult homework to complete.Leaning back, she ____ her feet onto the sofa to get comfortable.Whoever said babysitting was a(an) ____ way to make money obviously hadn't met the three boys, she thought.The television was on, the room was warm, and the lights were dim.Mary's ____ felt heavier and heavier.I mustn't sleep, she thought — which was ____ what she did, of course. Strangely enough, she soon ___ that she was a worldfamous chef(主厨)．She made a ____ and wore diamonds and designer clothes.Most days she relaxed by the pool, meeting the rich and famous or ____ — her favorite hobby.She ____ took the leading role in her own TV show. That is, until she became too ____.“I am definitely the best in the world，” she thought, as she prepared a tasty chicken dish.But ___ seemed to go right.She spilt the flour, she dropped an egg and she cut her finger.Despite all the troubles, she ____ to get the chicken into the dove.Soon, smoke blanketed the room.The chicken was on fire.____ set in, but Mary could not run — she was ____ to the spot.She tried hard to move, but could not, ____ a sharp sound awoke her. She got shocked and confused — ____ was pouring from the kitchen.Rushing to investigate, she was met by three ____ little faces and some very burnt bread.“Sorry, we were hungry and you were ____， so we tried to make some bread，” explained a boy.Relieved, Mary made them a snack and sent them back to bed.She____ them never to fall asleep on the job again！
|