钩体病的主要传染源是()。
A.室内褐家鼠
B.仔猪
C.黑线姬鼠
D.眼镜蛇
E.鸡
参考答案:C
I would rather buy a house in the beautiful and quiet suburb than _______ in the crowded city.
A.it
B.one
C.this
D.that
精囊腺位于()
A.前列腺下方
B.膀胱底部,输精管壶腹的外侧
C.直肠上方
D.同侧输精管内侧
E.膀胱后方