人体感冒发热时,脸部发红,是由于( )
A.皮肤的色素扩散
B.皮肤的色素聚集
C.皮肤的毛细血管收缩
D.皮肤的毛细血管扩张
答案:D
..His grandfather was among the first to settle in ____is now a famous holiday center.
A.what
B.which
C.where
D.that
流行性脑脊髓膜炎的病变性质属于()。
A.变质性炎
B.渗出性炎
C.化脓性炎
D.肉芽肿性炎
E.增生性炎