某班抽取6名同学参加体能测试，成绩如下：80，90，75，75，80，80．下列

把命题“等角的余角相等”写成“如果……，那么……”的形式为：___________________________________________________________。

在具有PCI/ISA总线结构的奔腾机中，打印机一般是通过打印接口连接到下列哪一种总线上的？

A．CPU局部总线

B．PCI总线

C．ISA总线(AT总线)

D．存储器总线

一高层框架核心筒结构，该建筑沉降观测点宜选（）。

A．建筑的四角

B．核心筒四角

C．沿外墙每30m处

D．每隔2-3根柱基上

关于二审抗诉程序，下列哪个选项是错误的（）

A．地方各级人民检察院对同级人民法院第一审判决、裁定的抗诉，通过原审人民法院提交抗诉书，并将抗诉书副本抄送上一级人民检察院 

B．原审人民法院应当在抗诉期满后5日以内，将抗诉书连同案卷、证据移送上一级人民法院，并且将抗诉书副本送交当事人 

C．地方人民检察院接到下级人民检察院的抗诉书后，如果认为抗诉不当，可以向同级人民法院撤回抗诉，并且通知下级人民检察院 

D．人民检察院在抗诉期限内撤回抗诉的，第一审人民法院不再移送案件；如果是在抗诉期满后撤回抗诉的，第二审人民法院可以裁定准许，并通知第一审人民法院和当事人

Ants first captured the attention of software engineers in the early 1990s. A single ant cannot do much on its own, but a group of ants (52) can solve complex problems. That inspired people like Marco Dorigo, who is one of the founders of a (53) known as group intelligence.

Ants are good at choosing the shortest possible route between a food (54) and their nest. This reminds us of a classic computational travelling-salesman problem. Given a list of cities and their (55) apart, the salesman must find the shortest route needed to visit each city once. As the number of cities (56) , the problem gets more complicated.Ants solve their own problem using chemical signals called pheromones (信息素), when an ant finds food, she takes it back to the nest, (57) a pheromone trail that will attract others. The more ants that (58) the trail, the per it becomes. (59) , the pheromones evaporate (挥发) quickly, so once all the food has been collected, the trail soon goes cold. This rapid evaporation means long trails are less (60) than short ones, all else being equal. Pheromones thus turn the (61) intelligence of the individual ants into something more powerful.

59().

A. Therefore

B. Furthermore

C. Then

D. However