【单选题】On receiving the relevant L/C, the ( )should first of all make a thorough examination to see whether the clauses set forth in the L/C are in full conformity with the terms stated in the sales contract...
【单选题】If payment of export trade is made by letter of credit, _______ , on receiving the relevant L/C, should first of all make a thorough examination to see whether the clauses set in the L/C are in full c...
【多选题】自再现模所应满足的积分方程是一个积分本征值方程,下列描述正确的有
A.
本征值决定自再现模的传输特性,包括 模的衰减、相移、谐振频率 等
B.
本征函数决定镜面上的场分布,包括 场的振幅和相位分布
C.
表示某一自再现 模振幅衰减和相位移动的复常数因子 与此方程本征值有关
【单选题】下列关于PCB Layout设计布线的注意事项,何者不适当?
C.
走线避免90度角转弯可以使平滑圆弧或者45度角转弯的走线
【简答题】是抛物线 上两点,满足 ( 为坐标原点),求证(1) 两点的横坐标之积、纵坐标之积分别为定值;(2)直线 过一定点。
【单选题】On receiving the relevant L/C, the ( )should first of all make a thorough examination to see whether the clauses set forth in the L/C are in full conformity with the terms stated in the sales contra...
【简答题】I gave the car a thorough (inspect) ______ before buying it to make sure that it went well.
【简答题】((本题满分14分) 在锐角 中, 分别是角 所对的边,且 (1)确定角 的大小; (2)若 ,求 面积的最大值.
【单选题】下列关于PCB Layout设计布线的注意事项,何者不适当?
C.
走线避免使用90度角转弯,可使用平滑圆弧或45度角转弯的走线。
D.
添加泪滴(Teardrops)可以加强焊点、导孔的连接。