设U={三角形}，M={直角三角形}，N={等腰三角形}，则M∩N=______

The software architecture of a program or computing system is the structure or structures of the system, which comprise software______, the externally ______ properties of those components, and the relationships between them. The architecture is not the operational software. Rather, it is a ______ that enables a so, ware engineer to: analyze the ______ of the design in meeting its stated requirements, consider architectural alternatives at a stage when making design changes is still relatively easy, and reduce the ______ associated with the construction of the software.

A．changeability
B．effectiveness
C．testability
D．functionality

糖尿病所致面神经炎治疗首选（）

A.激素

B.针灸

C.控制血糖

D.按摩

E.抗感染

胶球泵的水源取自何处？

比尔斯(C.W.Beers)在1907年出版的《自觉之心》对( )有贡献。

A．心理咨询学
B．健康心理学
C．心理卫生事业
D．心理咨询职业

患者52岁，男性，3周前发现右下后牙龈有小包，有时口腔内觉有咸水。无其他不适，曾在外院照X片。查见右下第一前磨牙咬合面龋洞深，探无感觉，叩痛异常感，右下第一磨牙近中根尖部龈瘘，叩痛(-)，牙髓活力正常。X片见右下第一前磨牙根尖X透射区不规则，边界模糊。右下第三磨牙前倾阻生，余未见异常。

主诉牙应是

A．右下第一前磨牙

B．右下第二前磨牙

C．右下第一磨牙

D．右下第二磨牙

E．右下第三磨牙