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【单选题】
下列关于小肠适于吸收营养的结构特点中,表述正确的是( )A.
小肠是消化道中最长的一段
B.
小肠内表面有许多环形皱壁,皱壁表面有许多绒毛
C.
绒毛壁、毛细血管壁均是一层上皮细胞
D.
以上说法都正确
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举一反三
【单选题】If you could give anything in the world to your child, you might want to give a love of words. Young children who can express their feelings don't have as many temper tantrums (发脾气). They also learn t...
A.
to prevent herself from being hurt
B.
to learn a new word
C.
to warn her parents of the danger
D.
to show her large collection of words
【单选题】---Could you please give the dictionary to Wang Feng? ---Yes, of course! I’ll give it to him ________ he comes back.
A.
since
B.
before
C.
as soon as
D.
until
【简答题】碳纤维材料跟一般汽车材料有什么不同?
【单选题】有表里关系的经脉是
A.
足阙阴肝经与手阳明大肠经
B.
手阙阴心包经与手太阳小肠经
C.
足少阴肾经与足太阳膀胱经
D.
足少阳胆经与手阙阴心包经
E.
足太阳脾经与手太阳肺经
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