开口于中鼻道的鼻旁窦有（）、（）和筛窦前小房。
参考答案：上颌窦；额窦
口腔黏膜蓝黑色色素沉着，指缝、乳晕等色素沉着，见于（）
A.黏液性水肿
B.克汀病
C.肾上腺皮质功能不全
D.肢端肥大症
E.Cushing病
To deal with the global financial crisis, China ______ the international community to help developing
countries.
A. called on
B. called up
C. called in
D. called for
