由黏膜腺、黏膜下腺和主腺组成（）
A.睾丸
B.附睾管
C.输精管
D.精囊
E.前列腺
参考答案：E
判断句子正误。
( )1. This is an lemon.
In 1863, President Lincoln issued a declaration calling for the last Thursday of November_______ as
a day of thanksgiving.[ ]
A. being observed
B. observed
C. observing
D. to be observed
