品牌建设运营的最高境界是（）。 A.品牌培育化 B.品牌宣传 C.确保产品质量 D.

The evidence suggests that the correlation of returns between U.S. government bonds and an index of international government bonds is:（）

A. between 0.0 and -0.5, and that between indices of U. S. investment grade bonds is between 0.0 and 0.5.

B. between 0.0 and 0.5, and that between indices of U. S. investment grade bonds is close to 1.0.

C. between 0.0 and 0.5, and that between indices of U. S. investment grade bonds is between 0.25 and 0.75.

— What about having a drink?

—_______.                                        

A．Good idea

B．Help yourself

C．Go ahead, please

D．Me, too

什么是现场总线系统？它由哪几层构成？

彩色多普勒血流显像技术检测主动脉瓣口血流，速度标尺应如何选择应用？

A、选择高速档 

B、选择低速档 

C、不需进行速度调节 

D、选择中等速度 

E、以上都不是

一女性患者，30岁，婚后2年未孕。现停经2个半月， * * 少量流血1周，伴腹胀。妇科检查：子宫增大如4个月大小，两侧附件阴性。为明确诊断，应首选下列哪项辅助检查

A.行诊断性刮宫术 

B.尿妊娠试验 

C.B超检查 

D.盆腔X线摄片 

E.宫腔镜检查