颈部大静脉损伤出现严重的空气栓塞时的紧急处理是A．结扎血管B．吻合血管C．右心室穿刺

In analyzing disclosures related to the financing liabilities of a company, which of the following disclosures would be least helpful to the analyst()

A. The interest expense for the period as provided on the income statement or in a footnote.

B. The present value of the future bond payments discounted at the coupon rate of the bonds.

C. Fillings with the Securities and Exchange Commission (SEC) that disclose all outstanding securities and their features.

下面是基础研究功能模式图示，读图后，请从“单线模式”角度用一句话阐述其弊端。

培养人才

              多线模式  人（科学家）           学术环境

  基础研究                                    科学理验

 单线模式     研究成果     科学实验     发展生产

答：单线模式强调以成果为中心，但是□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□

含砂量的计算公式为含砂量（体积分数）＝砂的体积/油样体积100%。

怎样判断加热炉燃烧的好坏？

（）流量计的转换器安装时，因流量计和转换器之间用专用电缆连接，所以不要安装的太远。

A、旋涡

B、腰轮

C、椭圆

D、超声波