下列长度的三条线段能组成三角形的是[ ] A.1 cm,2 cm,3.5 cm

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问题选择题

下列长度的三条线段能组成三角形的是 [ ]

A.1 cm,2 cm,3.5 cm

B.4 cm,5 cm,9 cm

C.5 cm,8 cm,15cm

D.6 cm,8 cm,9 cm

答案

单项选择题 A1/A2型题

流行性出血热双价苗是指下列哪一种疫苗？（）

A.灭活和非灭活混合疫苗

B.两种细胞混合培养疫苗

C.两种组织混合培养疫苗

D.两种疫苗合并应用

E.家鼠型和野鼠型混合疫苗

单项选择题

Which of the following statements about portfolio risk is true（）

A. In the absence of perfectly positive correlation, a portfolio will always have lower risk than the average risk of the component assets.

B. In the absence of perfectly positive correlation, a portfolio will always have lower risk than the risk of each of the component assets.

C. In the absence of perfectly negative correlation, a portfolio will always have lower risk than the risk of each of the component assets.