设一线性表中有a1，a2，…，a500个元素按递增顺序排列，则用二分法查找给定值 K

下列命题的逆命题是真命题的个数是（　　）

①若a＞b，则am＞bm；

②同位角相等，两直线平行；

③直角三角形两锐角互余；

④若ab＜0，则a、b异号．

A．0个

B．1个

C．2个

D．3个

颌骨内一多房囊状透亮影，可以排除以下哪种疾病（）。

A.根尖周囊肿

B.含牙囊肿

C.牙源性钙化囊性瘤

D.牙源性角化囊性瘤

E.颌骨中心性血管瘤

下列关于市场需求预测分析的说法，正确的是( )。

A．市场分析有助于银行了解拟建项目所生产的产品的市场现状

B．市场需求预测分析可用于考察项目产品在特定时期内是否有市场，以及采取怎样的营销战略来实现销售目标

C．市场需求预测应建立在对需求量进行调查的基础上

D．市场分析有助于银行预测拟建项目所生产的产品的未来发展趋势

E．市场需求预测分析可用于分析和判断项目投产后所生产产品的未来销路问题

Routing protocols use different techniques for assigning (37) to individual networks. Further, each routing protocol forms a metric aggregation in a different way. Most routing protocols can use multiple paths if the paths have an equal (38) Some routing protocols can even use multiple paths when paths have an unequal cost. In either case, load (39) can improve overall allocation of network bandwidth. When multiple paths are used, there are several ways to distribute the packets. The two most common mechanisms are per-packet load balancing and per-destination load balancing. Per-packet load balancing distributes the (40) across the possible routes in a manner proportional to the route metrics. Per-destination load balancing distributes packets across the possible routes based on (41)

41（）

A.destinations 

B.resources 

C.packets 

D.sources

SSRIs中药物相互作用最小的是（）

A.帕罗西汀

B.舍曲林

C.西酞普兰

D.氟西汀

E.氟伏沙明