顺时针圆弧插补指令为G04。

公路运输企业的运输生产计划包括( )

A．车辆完好率

B．平均车日行程

C．车辆工作率

D．出车时间利用系数

E．平均每日出车计划

本大题要求判断所给出的条件能否充分支持题干中陈述的结论，阅读条件(1)和(2)后选择：

(A) 条件(1)充分，但条件(2)不充分．

(B) 条件(2)充分，但条件(1)不充分．

(C) 条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分．

(D) 条件(1)充分，条件(2)也充分．

(E) 条件(1)和(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．

过原点的直线与圆x²+y²+4x+3=0相切，则该直线的方程为

(1)切点在第二象限；(2)切点在第三象限；

义务性支出也称强制性支出，是收人中必须优先满足的支出，下列不属于义务性支出的是()。

A.日常生活基本开销

B.已有负债的本利摊还支出

C.购买奢侈品的支出

D.已有保险的续期保费支出

下列各项，不见于正常人的脉象是（）

A.濡脉

B.缓脉

C.迟脉

D.滑脉

E.沉脉

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

(21) 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.

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

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

(24) is the popular LAN developed under the direction of the IEEE802.5.

(25) 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.

（22）是（）

A.ISO

B.ANSI

C.CCYIT

D.IEEE