作直方图时收集的数据要（）个，否则反映分布的误差太大。A．大于10 B．大于50 C

位于海南岛和雷州半岛之间的海峡是[ ]

A．台湾海峡

B．对马海峡

C．渤海海峡

D．琼州海峡

帕金森病主要的病理改变在

A．小脑及脑干

B．黑质纹状体

C．大脑皮质

D．周围神经

E．外周肌肉

According to the Global Investment Performance Standards (), which of the following statements is most accurat.e about composites used for performance presentation of a investment management firm（）

A. Composites must include one or more portfolios managed to a similar investment strategy, objective or mandate.

B. Composites must include all discretionary and non-discretionary portfolios managed to a similar investment strategy, objective or mandate.

C. Composites must include all fee-paying and non-fee paying portfolios managed to a similar investment strategy, objective or mandate.

参与集合资产管理计划的客户应当具备相应的金融投资经验和风险承受能力。( )

为什么摄像头会出现蓝屏现象？