搜题请搜索小程序“爱下问搜题”
问题 判断题

长期趋势法适用对象是价格有明显季节波动的房地产，适用的条件是拥有估价对象或类似房地产较长时期的历史价格资料，而且所拥有的历史价格资料必须真实。( )

答案

参考答案：错

单项选择题

In the following essay, each blank has four choices. Choose the best answer and write down on the answer sheet.

In low - speed network, it is usually adequate to wait for congestion to occur and then react to it by telling the source of packets to slow down. In high - speed networks, this approach often works poorly, because in the (1) between sending the notification and notification arriving at the source, thousands of additional (2) may arrive. In ATM network, a major tool for preventing (3) is (4) control. When a host wants a new virtual (5) , it must describe the traffic to be offered and the service expected.

3（）

A．collision

B．congestion

C．drop

D．delay
查看答案
选择题
一带电粒子射入一固定在O点的点电荷的电场中，粒子运动的轨迹如图虚线所示，图中实线是同心圆弧，表示电场的等势面，不计重力，可以判断（　　）

A．此粒子由a到b，电场力做正功，由b到c，粒子克服电场力做功

B．粒子在b点的电势能一定大于在a点的电势能

C．等势面a比等势面b的电势高

D．粒子在c点的速度和在a点的速度大小相等
查看答案