关于x的一元二次方程（a-3）x2-4x-1=0有两个不相等的实数根，则a满足（

母公司可利用全球性经营的有利条件合理调拨资金。为了节约利息支出，降低国际间资金流动的风险，通常的做法是（）。

A.在国外子公司保持必要的现汇，将大部分现金集中于公司总部

B.在公司总部保持必要的现汇，将大部分现金集中于中心地区分部

C.将所有现金在公司总部与国外子公司间平均分配

D.将大部分现金集中于业务发展较快的子公司

对具体生产操作岗位的操作、技术、质量管理等所做的进一步详细要求

A．二冬
B．二术
C．二母
D．二活
E．二枫藤上述药物分别是指

患者男，40岁，抗结核药物治疗半年后出现双眼视力下降。无眼痛及其他全身疾病史。检查：双眼视 * * 边界略模糊，检查视野见中心暗点。可能的诊断是（）

A.缺血性视神经病变

B.乙胺丁醇中毒性视神经病变

C.奎宁中毒性视神经病变

D.球后视神经炎

E.视 * * 血管炎

Software architecture reconstruction is an interpretive, interactive, and iterative process including many activities. (1) involves analyzing a system's existing design and implementation artifacts to construct a model of it. The result is used in the following activities to construct a view of the system. The database construction activity converts the (2) contained in the view into a standard format for storage in a database. The (3) activity involves defining and manipulating the information stored in database to reconcile, augment, and establish connections between the elements. Reconstruction consists of two primary activities: (4) and (5). The former provides a mechanism for the user to manipulate architectural elements, and the latter provides facilities for architecture reconstruction.

空白（4）处应选择（）

A.architecture analysis and design

B.domain analysis and static modeling

C.visualization and interaction

D.user requirements modeling

如图5-3-5所示变截面圆轴，当A截面承受转矩T₁时，A截面的扭转角为φ₁，轴的变形能为U₁；当B截面承受转矩T₂时，B截面的扭转角为φ₂，轴的变形能为U₂。若该轴同时承受图示转矩T₁和T₂时，轴的变形能应为（）。

A.A

B.B

C.C

D.D