胆道完全阻塞 A．发热伴结膜充血 B．发热伴关节肿痛 C．发热伴肝脾大 D．发热伴咯

加强执政能力建设的目标要求是( )

A．科学执政

B．团结执政

C．民主执政

D．依法执政

所有高温的管道、容器等设备上都应有（），保温层应（）。当环境温度在25℃时，保温层表面的温度不宜超过（）。

An analyst does research about relationship between credit spreads and economic well being. In general, credit spreads on corporate bonds tend to:（）

A. tighten during both economic expansions and economic contractions.

B. widen during economic expansions and tighten during economic contractions.

C. tighten during economic expansions and widen during economic contractions.

上颌一侧中切牙缺失，对侧同名牙轻度外翻，修复时人工牙的正确排列应是（）

A．按缺隙大小排牙

B．按一般扭转度排牙

C．对称地将人工牙排成轻度外翻

D．按邻牙弧度排牙

E．按关系排牙

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