在采用点—点通信线路的网络中,由于连接多台计算机之间的线路结构复杂,因此确定分组从源

题型:单项选择题

问题:

在采用点—点通信线路的网络中,由于连接多台计算机之间的线路结构复杂,因此确定分组从源结点通过通信子网到达目的结点的适当传输路径需要使用______。

A.差错控制算法

B.路由选择算法

C.拥塞控制算法

D.协议变换算法

考点:计算机等级考试网络技术三级网络技术笔试77
题型:单项选择题

Proper arrangement of classroom space is important to encouraging interaction. Most of us have noticed how important physical setting is to efficiency and comfort in our work. College classroom space should be designed to encourage the activity of critical thinking. We may be approaching the twenty-first century, but step into almost any college classroom and you step back in time at least a hundred years. Desks are normally in straight rows, so students can clearly see the teacher but not all their classmates. The assumption behind such an arrangement is obvious. Everything of importance comes from the teacher.

With a little imagination and effort, unless desks are fixed to the floor, the teacher can correct this situation and create space that encourages interchange among students. In small or standard-size classes, chairs, desks, and tables can be arranged in a variety of ways. The primary goal should be for everyone to be able to see everyone else. Larger classes, particularly those held in lecture halls, unfortunately, allow much less flexibility.

Arrangement of the classroom should also make it easy to divide students into small groups for discussion or problem-solving exercises. Small classes with movable desks and tables present no problem. Even in large lecture halls, it is possible for students to turn around and form groups of four to six. Breaking a class into small groups provides more opportunities for students to interact with each other, think out loud, and see how other students’ thinking processes operate all essential elements in developing new modes of critical thinking. In courses that regularly use a small group format, students might be asked to stay in the same small groups throughout the course. A colleague of mine, John, allows students to move around during the first two weeks, until they find a group they are comfortable with. John then asks them to stay in the same seat, with the same group, from that time on. This not only creates a comfortable setting for interaction but helps him learn students’ names and faces.

All the following statements are true according to the passage except that ().

A. new kinds of desks and chairs should be made

B. many companies are trying to improve the working settings for their employees

C. classroom interaction between students is essential to the training of critical thinking

D. a comfortable environment leads to higher working efficiency

题型:单项选择题

9.954保留两位小数是10.00.______.

题型:单项选择题

患者女性,38岁。宫颈中度糜烂,颗粒型,无盆腔及 * * 炎症,宫颈刮片未见癌细胞。应选用最恰当的治疗是()

A.硝酸银腐蚀法

B.中药内服

C.激光治疗

D.全子宫切除

E.抗生素治疗

题型:单项选择题

近代中国科学技术远远落后于欧美,但有位卓越的科学家不畏困难,勇于探索。终于揭开了制碱的奥秘而成为世界公认的制碱权威。他是  [ ]

A.詹天佑    

B.侯德榜    

C.冯如    

D.李善兰

题型:单项选择题

航空活塞发动机在高度、转速和进气压力不变的情况下工作,汽化器内气体温度升高将使().

A.发动机功率增加

B.发动机功率不变

C.发动机功率减小

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