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【单选题】
菊科植物的雄蕊类型为A.
单体雄蕊
B.
二体雄蕊
C.
二强雄蕊
D.
聚药雄蕊
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举一反三
【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. [ ]
A.
shall
B.
may
C.
will
D.
can
【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】The computer can be paid for in ten monthly________ of 100 dollars.
A.
pay
B.
pays
C.
payment
D.
payments
【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.
A.
shall
B.
mustn’t
C.
can’t
D.
will
【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。
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