虹吸式口器
参考答案:
吸食物体表面的液汁,如蝶娥类的口器,上颚退化,下颚发达,形成能弯曲的管状的喙。
The point is that no medicine is ________ for children when they are infected with the hand-foot-mouth disease (HFMD).
A.alternative B.absurd
C.available D.harmony
根据MRI表现,考虑何种疾病是()
A.Dandy-Walker综合征
B.Arnold-Chiari畸形
C.颅底凹陷症
D.大脑导水管狭窄
E.脑膨出