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【简答题】
胸腺大部分位于胸腔上纵隔前份，分为不对称的左、右叶；胸腺表面覆有薄层结缔组织构成的被膜，被膜的结缔组织伸入胸腺实质形成小叶间隔，把胸腺实质分隔成许多分隔不全的小叶，小叶周边为皮质，深部为髓质；胸腺实质主要由胸腺细胞和胸腺上皮细胞组成；胸腺为中枢性淋巴器官，主要功能是形成初始T细胞。
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举一反三
【单选题】The person who is _______ of the factory _______ ill since last week.
A.
in charge; has been
B.
in the charge; fallen
C.
taking charge; was
D.
in charge; fell
【简答题】旋转泵的工作原理?
【单选题】You should be careful of such a person flatters you in your presence and speaks ill of you in behind.
A.
who
B.
that
C.
as
D.
which
【单选题】The person ___ of the factory has ___ ill since last week.
A.
in charge, been
B.
in the charge, fallen
C.
taking charge, fallen
D.
in charge, fell
【单选题】The person who is _______ of the factory _______ ill since last week.
A.
in charge; has been
B.
in the charge; has fallen
C.
taking charge; was
D.
in charge; fell
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