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【单选题】
患儿,男,2个月。居住在12楼,有奶奶看护,很少到室外去,最近经常烦躁、睡眠不安、夜间啼哭,多汗,枕秃,被诊断为维生素D缺乏性佝偻病初期,该患儿患本次病的最主要因素是
A.
食物中维生素D摄入不足
B.
日光照射不足
C.
食物中钙含量过低
D.
未及时添加鱼肝油
E.
婴儿生长过速
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参考答案：
举一反三
【单选题】How long does it take him to walk to the bookshop?
A.
Twenty minutes
B.
Half an hour.
C.
Ten minutes
D.
Forty minutes.
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【单选题】-- does it take him to get to school? --About fifteen minutes.
A.
How often
B.
How long
C.
How much
D.
How far
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【单选题】【图片】如图所示，VD1、VD2均为理想二极管，下列哪个说法是正确的？
A.
两个二极管VD1、VD2均导通。
B.
二极管VD1优先导通。
C.
输出直流电压Uo为6V。
D.
输出直流电压Uo为-3V。
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【简答题】How long does it take him to __________ to the shopping mall? (mind drive survey issue)
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【单选题】Did it take him to get through the work?__________
A.
one and a half year
B.
B two Scores of days
C.
several hundred days
D.
four dozens weeks
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【单选题】电路如下图所示,设二极管D1、D2、D3为理想二极管,则输出电压U0=( )。
A.
-2V
B.
0V
C.
6V
D.
12V
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【单选题】如图,V1、V2为理想二极管。VAB为( )V
A.
6
B.
-6
C.
-12
D.
0
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【单选题】——______ did it take him to draw the horse? ——Half a week.
A.
How much
B.
How often
C.
How long
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【单选题】— ______does it take him to come to work by train? — An hour. [     ]
A.
How often
B.
How long
C.
How far
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【单选题】_____ does it take him to walk to the park every day? [     ]
A.
How far
B.
How often
C.
How long
D.
How much
查看完整题目与答案
相关题目：
【单选题】How long does it take him to walk to the bookshop?
A.
Twenty minutes
B.
Half an hour.
C.
Ten minutes
D.
Forty minutes.
查看完整题目与答案
【单选题】-- does it take him to get to school? --About fifteen minutes.
A.
How often
B.
How long
C.
How much
D.
How far
查看完整题目与答案
【单选题】【图片】如图所示，VD1、VD2均为理想二极管，下列哪个说法是正确的？
A.
两个二极管VD1、VD2均导通。
B.
二极管VD1优先导通。
C.
输出直流电压Uo为6V。
D.
输出直流电压Uo为-3V。
查看完整题目与答案
【简答题】How long does it take him to __________ to the shopping mall? (mind drive survey issue)
查看完整题目与答案
【单选题】Did it take him to get through the work?__________
A.
one and a half year
B.
B two Scores of days
C.
several hundred days
D.
four dozens weeks
查看完整题目与答案
【单选题】电路如下图所示,设二极管D1、D2、D3为理想二极管,则输出电压U0=( )。
A.
-2V
B.
0V
C.
6V
D.
12V
查看完整题目与答案
【单选题】如图,V1、V2为理想二极管。VAB为( )V
A.
6
B.
-6
C.
-12
D.
0
查看完整题目与答案
【单选题】——______ did it take him to draw the horse? ——Half a week.
A.
How much
B.
How often
C.
How long
查看完整题目与答案
【单选题】— ______does it take him to come to work by train? — An hour. [     ]
A.
How often
B.
How long
C.
How far
查看完整题目与答案
【单选题】_____ does it take him to walk to the park every day? [     ]
A.
How far
B.
How often
C.
How long
D.
How much
查看完整题目与答案
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