【单选题】What's the difference between 'documents against acceptance' and' documents against payment'?
A.
The buyer has to pay for the goods before he gets the Bill of Exchange in the second situation.
B.
The buyer has to sign the Bill of Lading in the first situation.
C.
The buyer has to sign the Bill of Exchange in the first situation.
D.
The buyer has to pay the Bill in the first situation.
【简答题】It is only _________ view _________ our long friendly relation that we accept D/P payment for future dealings.
【单选题】MAC地址表抖动现象是由于( )
A.
相同帧的副本在同一台交换机的两个不同端口被接收引起的
B.
不同帧的副本在同一台交换机的两个不同端口被接收引起的
C.
相同帧的副本在同一台交换机的同一端口被接收引起的
D.
不同帧的副本在同一台交换机的同一端口被接收引起的
【单选题】关于聚乙烯管道热熔承插连接的描述,下列不正确的是()。
B.
连接前,应校直两对应的待连接处,使其在同一轴线上
D.
加热完毕,在至少10min的附加冷却时间内,不能让接头承受过大的应力
【单选题】The computer can be paid for in ten monthly________ of 100 dollars.
【简答题】在全球范围内,经济体制主要包括三大类型: 、 、和 。
【单选题】—Can I pay the bill by check? --- Sorry, sir. But it is the management rules of our hotel that payment ____ be made in cash.
【简答题】按键动作引起的电平抖动现象是难以避免的。它会造成单片机将一次按键动作误读为按下多次 , 因而会造成控制的失误。为此必须设法消除开关信号的抖动。可以通过()消抖和() 消抖 两种方法消除抖动现象。
【判断题】电动机启动后,注意听和观察电动机有无抖动现象及转向是否正确。