某国债面值为100元，票面利率为5%，起息日是7月5日，交易日是12月18日，则已计

如图所示，在光滑水平面上放一质量为m斜面体A，在A的斜面上又放一质量也为m的滑块B；用力F推滑块A使两者无相对滑动地向前加速运动，则对两物体所受的合力下列说法正确的是（　　）

A．斜面体A比滑块B受的合力大

B．滑块B比斜面体A受的合力大

C．A、B受的合力同样大

D．不能判断谁大谁小

下列房地产估价原则中，评估现状价值不适用的原则是（）。

A.替代原则

B.合法原则

C.最高最佳利用原则

D.价值时点原则

耦合度是度量模块独立性的指标之一，若一组模块都访问同一数据结构，则称为 ( )。

A．内容耦合
B．公共耦合
C．外部耦合
D．控制耦合

一般活塞安装的第一道气环（）。

A、表面镀铬

B、表面镀锡

C、表面镀铜

D、与其他活塞环一样

For each blank, choose the best answer from the four choices and write down on the answer sheet.

(1) is a six bytes OSI layer 2 address which is burned into every networking device that provides its unique identity for point to point communication.

(2) is a professional organization of individuals in multiple professions which focuses on effort on lower-layer protocols.

(3) functions with two layers of protocols. It can connect networks of different speeds and can be adapted to an environment as it expands.

(4) is the popular LAN developed under the direction of the IEEE 802.5.

(5) is the popular backbone technology for transmitting information at high speed with a high level of fault tolerance which is developed under the direction of ANSI.

2（）

A．ISO

B．ANSI

C．CCYIT

D．IEEE