Since you weren't at the meeting, we ___

Why save endangered species For the general public, endangered species appear to be little more than biological oddities. A very different perception is gained from considering the issue of extinction in a wider context. The important point is that many major social advances have been made on the basis of life forms whose worth would never have been perceived in advance. Consider the impact of rubber-producing plants on contemporary life and industry: approximately two-thirds of the world’s rubber supply comes from rubberproducing plants and is made into objects as diverse as rubber washers and rubber boots.
The author’s point is made chiefly by

A．acknowledging the validity of two opposing points of view.

B．appealing to the emotions of the audience rather than to their intellects.

C．suggesting a useful perspective for viewing the question raised at the beginning of the passage.

D．trying to discredit the view of an opponent without presenting an alternative hypothesis.

E．(E) generalizing from similar to dissimilar cases.

由于资本市场线通过无风险资产[点(0，r_f)]及市场组合M[点(σ_M，E(r_m)]，于是资本市场线的方程可以表示为：，则下列说法正确的是 ( )

A．E(r_m)表示资产组合M的期望收益率

B．σ_p表示有效组合P的方差

C．β表示风险溢价

D．σ_p表示有效组合P的标准差

影响房地产价格的物理性状因素，主要有（）等。

A.大气环境

B.人文环境

C.声觉环境

D.水文环境

E.卫生环境

采煤工作面必须及时（）或充填，控顶距离超过作业规程规定时，禁止（）。

下列对“用删除项目功能删除的项目如何恢复”的说法中正确的是（）。

A.不能恢复

B.用恢复项目功能

C.在电脑的回收站里恢复

D.在项目路径中找文件夹