单项选择题

属于内分泌组织的是

A、睾丸

B、腮腺

C、胰岛

D、卵巢

E、下颌下腺

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What does the passage say about the shift from the role of husband to that of father?
A、Numerous books have been written about it.
B、Not enough attention has been paid to it.
C、The shift is harder for men than for women.
D、The shift is a difficult but incomplete one.

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