We used to weld pipes with direct current ( D.C) are welder ( alternating current A.C. welder).

Study on the Process of Metal Ions A.C. Deposited into Porous Anodic Alumina Film

多孔阳极氧化铝膜内交流电沉积金属粒子的历程研究

The difference between value and average value of A.C.

交变电流有效值与平均值的区别。

Can't we just stay a little bit longer? We don't have any A.C. At home.

我们不能再待会儿吗家里都没有空调

Short-line fault tests for A.C. high-voltage circuit-breaker

GB/T4474-1992交流高压断路器的近区故障试验

Combined a.c. and d.c. welding power source The meter can be measured as in all kinds of AC/ DC ampere 、 AC/ DC voltage.

交直流两用弧焊电源本仪表适用各种工业用电的交流直流电流电压测量显示。

A.C. Impedance Technique ── A New Methods to Determine the Changes of Microstructure in the Process of Cement Hydration in Situ

交流阻抗技术&一种动态检测水泥水化过程微结构变化的新方法

I'm going to a.c., and I'm winning a dinette set.

我要去亚特兰大。我要赢取一套小餐桌。

Analysis by Complex Number on the MMF of A.C. Machine Windings

交流电机统组磁势的复数分析法

A Development of High Performance Control System for A.C. P M Square Wave Synchromotor

高性能交流永磁方波同步电机控制系统的研制

APPLICATIONS OF A.C. OSCILLOGRAPHIC POLAROGRAPHY ⅰ. Determination of Pb in Pure Hydrochloric Acid ( Internal Standard Method)

交流示波极谱法在痕量分析中的应用Ⅰ.纯盐酸中痕量铅的测定（内标法）

The rectifier lets current flow into the battery only when A.C. surges in the direction of the arrow.

只有当交流电流沿箭头方向急冲时，整流器才允许电流流入电池组。

The Electromagnetic Energy Transmission in A.C. Components

交流元件的电磁能量传输

Me and the D.A, who happen to be very tight with one another ( bTom Wolfe)

我和那位文学博士碰巧关系很密切（b汤姆沃尔夫）

C.the best voice D.a better voice.

形容词的比较级表达最高级含义。

D.A Westerner eating in a Chinese home.

一个西方人饮食在中国的家。

D.A bank that advises an amendment should inform the bank from which it received the amendment of any notification of acceptance or rejection.

通知修改的银行应当通知向其发出修改书的银行任何有关接受或拒绝接受修改的通知。

A.A flower B.A sword C.A child D.A bow and a arrow

一朵花一把剑一个小孩一副弓箭答案：D

“ The Capital Gazatte ”, first published in the Han Dynasty ( 206 B. C.-220 A. D.), was the earliest newspaper in the world.

创始于中国汉代的《邸报》是世界上最早的报纸。

The following information applies to both alternative routes C and D.

下列信息同时适用于备选路线c和d。

A pair of honeymooners checked into the Watergate Hotel in Washington, D. C. That night, as the husband was about to turn off the light, his bride asked, "Do you think this room is bugged1?"

有一对正在华盛顿度蜜月的新婚夫妇，他们来到水门旅馆登记住宿。到了晚上，丈夫刚要熄灯，新娘子问道：“你觉得房间里会不会装有窃听器？”